2021-luvut

list = [None] * 1003
list[1] = 2021
list[2] = 12021
list[3] = 20021
list[4] = 20121
list[5] = 20201
list[6] = 20210
list[7] = 20211
list[8] = 20212
list[9] = 20213
list[10] = 20214
list[11] = 20215
list[12] = 20216
list[13] = 20217
list[14] = 20218
list[15] = 20219
list[16] = 20221
list[17] = 20231
list[18] = 20241
list[19] = 20251
list[20] = 20261
list[21] = 20271
list[22] = 20281
list[23] = 20291
list[24] = 20321
list[25] = 20421
list[26] = 20521
list[27] = 20621
list[28] = 20721
list[29] = 20821
list[30] = 20921
list[31] = 21021
list[32] = 22021
list[33] = 23021
list[34] = 24021
list[35] = 25021
list[36] = 26021
list[37] = 27021
list[38] = 28021
list[39] = 29021
list[40] = 32021
list[41] = 42021
list[42] = 52021
list[43] = 62021
list[44] = 72021
list[45] = 82021
list[46] = 92021
list[47] = 102021
list[48] = 112021
list[49] = 120021
list[50] = 120121
list[51] = 120201
list[52] = 120210
list[53] = 120211
list[54] = 120212
list[55] = 120213
list[56] = 120214
list[57] = 120215
list[58] = 120216
list[59] = 120217
list[60] = 120218
list[61] = 120219
list[62] = 120221
list[63] = 120231
list[64] = 120241
list[65] = 120251
list[66] = 120261
list[67] = 120271
list[68] = 120281
list[69] = 120291
list[70] = 120321
list[71] = 120421
list[72] = 120521
list[73] = 120621
list[74] = 120721
list[75] = 120821
list[76] = 120921
list[77] = 121021
list[78] = 122021
list[79] = 123021
list[80] = 124021
list[81] = 125021
list[82] = 126021
list[83] = 127021
list[84] = 128021
list[85] = 129021
list[86] = 132021
list[87] = 142021
list[88] = 152021
list[89] = 162021
list[90] = 172021
list[91] = 182021
list[92] = 192021
list[93] = 200021
list[94] = 200121
list[95] = 200201
list[96] = 200210
list[97] = 200211
list[98] = 200212
list[99] = 200213
list[100] = 200214
list[101] = 200215
list[102] = 200216
list[103] = 200217
list[104] = 200218
list[105] = 200219
list[106] = 200221
list[107] = 200231
list[108] = 200241
list[109] = 200251
list[110] = 200261
list[111] = 200271
list[112] = 200281
list[113] = 200291
list[114] = 200321
list[115] = 200421
list[116] = 200521
list[117] = 200621
list[118] = 200721
list[119] = 200821
list[120] = 200921
list[121] = 201021
list[122] = 201121
list[123] = 201201
list[124] = 201210
list[125] = 201211
list[126] = 201212
list[127] = 201213
list[128] = 201214
list[129] = 201215
list[130] = 201216
list[131] = 201217
list[132] = 201218
list[133] = 201219
list[134] = 201221
list[135] = 201231
list[136] = 201241
list[137] = 201251
list[138] = 201261
list[139] = 201271
list[140] = 201281
list[141] = 201291
list[142] = 201321
list[143] = 201421
list[144] = 201521
list[145] = 201621
list[146] = 201721
list[147] = 201821
list[148] = 201921
list[149] = 202001
list[150] = 202010
list[151] = 202011
list[152] = 202012
list[153] = 202013
list[154] = 202014
list[155] = 202015
list[156] = 202016
list[157] = 202017
list[158] = 202018
list[159] = 202019
list[160] = 202021
list[161] = 202031
list[162] = 202041
list[163] = 202051
list[164] = 202061
list[165] = 202071
list[166] = 202081
list[167] = 202091
list[168] = 202100
list[169] = 202101
list[170] = 202102
list[171] = 202103
list[172] = 202104
list[173] = 202105
list[174] = 202106
list[175] = 202107
list[176] = 202108
list[177] = 202109
list[178] = 202110
list[179] = 202111
list[180] = 202112
list[181] = 202113
list[182] = 202114
list[183] = 202115
list[184] = 202116
list[185] = 202117
list[186] = 202118
list[187] = 202119
list[188] = 202120
list[189] = 202121
list[190] = 202122
list[191] = 202123
list[192] = 202124
list[193] = 202125
list[194] = 202126
list[195] = 202127
list[196] = 202128
list[197] = 202129
list[198] = 202130
list[199] = 202131
list[200] = 202132
list[201] = 202133
list[202] = 202134
list[203] = 202135
list[204] = 202136
list[205] = 202137
list[206] = 202138
list[207] = 202139
list[208] = 202140
list[209] = 202141
list[210] = 202142
list[211] = 202143
list[212] = 202144
list[213] = 202145
list[214] = 202146
list[215] = 202147
list[216] = 202148
list[217] = 202149
list[218] = 202150
list[219] = 202151
list[220] = 202152
list[221] = 202153
list[222] = 202154
list[223] = 202155
list[224] = 202156
list[225] = 202157
list[226] = 202158
list[227] = 202159
list[228] = 202160
list[229] = 202161
list[230] = 202162
list[231] = 202163
list[232] = 202164
list[233] = 202165
list[234] = 202166
list[235] = 202167
list[236] = 202168
list[237] = 202169
list[238] = 202170
list[239] = 202171
list[240] = 202172
list[241] = 202173
list[242] = 202174
list[243] = 202175
list[244] = 202176
list[245] = 202177
list[246] = 202178
list[247] = 202179
list[248] = 202180
list[249] = 202181
list[250] = 202182
list[251] = 202183
list[252] = 202184
list[253] = 202185
list[254] = 202186
list[255] = 202187
list[256] = 202188
list[257] = 202189
list[258] = 202190
list[259] = 202191
list[260] = 202192
list[261] = 202193
list[262] = 202194
list[263] = 202195
list[264] = 202196
list[265] = 202197
list[266] = 202198
list[267] = 202199
list[268] = 202201
list[269] = 202210
list[270] = 202211
list[271] = 202212
list[272] = 202213
list[273] = 202214
list[274] = 202215
list[275] = 202216
list[276] = 202217
list[277] = 202218
list[278] = 202219
list[279] = 202221
list[280] = 202231
list[281] = 202241
list[282] = 202251
list[283] = 202261
list[284] = 202271
list[285] = 202281
list[286] = 202291
list[287] = 202301
list[288] = 202310
list[289] = 202311
list[290] = 202312
list[291] = 202313
list[292] = 202314
list[293] = 202315
list[294] = 202316
list[295] = 202317
list[296] = 202318
list[297] = 202319
list[298] = 202321
list[299] = 202331
list[300] = 202341
list[301] = 202351
list[302] = 202361
list[303] = 202371
list[304] = 202381
list[305] = 202391
list[306] = 202401
list[307] = 202410
list[308] = 202411
list[309] = 202412
list[310] = 202413
list[311] = 202414
list[312] = 202415
list[313] = 202416
list[314] = 202417
list[315] = 202418
list[316] = 202419
list[317] = 202421
list[318] = 202431
list[319] = 202441
list[320] = 202451
list[321] = 202461
list[322] = 202471
list[323] = 202481
list[324] = 202491
list[325] = 202501
list[326] = 202510
list[327] = 202511
list[328] = 202512
list[329] = 202513
list[330] = 202514
list[331] = 202515
list[332] = 202516
list[333] = 202517
list[334] = 202518
list[335] = 202519
list[336] = 202521
list[337] = 202531
list[338] = 202541
list[339] = 202551
list[340] = 202561
list[341] = 202571
list[342] = 202581
list[343] = 202591
list[344] = 202601
list[345] = 202610
list[346] = 202611
list[347] = 202612
list[348] = 202613
list[349] = 202614
list[350] = 202615
list[351] = 202616
list[352] = 202617
list[353] = 202618
list[354] = 202619
list[355] = 202621
list[356] = 202631
list[357] = 202641
list[358] = 202651
list[359] = 202661
list[360] = 202671
list[361] = 202681
list[362] = 202691
list[363] = 202701
list[364] = 202710
list[365] = 202711
list[366] = 202712
list[367] = 202713
list[368] = 202714
list[369] = 202715
list[370] = 202716
list[371] = 202717
list[372] = 202718
list[373] = 202719
list[374] = 202721
list[375] = 202731
list[376] = 202741
list[377] = 202751
list[378] = 202761
list[379] = 202771
list[380] = 202781
list[381] = 202791
list[382] = 202801
list[383] = 202810
list[384] = 202811
list[385] = 202812
list[386] = 202813
list[387] = 202814
list[388] = 202815
list[389] = 202816
list[390] = 202817
list[391] = 202818
list[392] = 202819
list[393] = 202821
list[394] = 202831
list[395] = 202841
list[396] = 202851
list[397] = 202861
list[398] = 202871
list[399] = 202881
list[400] = 202891
list[401] = 202901
list[402] = 202910
list[403] = 202911
list[404] = 202912
list[405] = 202913
list[406] = 202914
list[407] = 202915
list[408] = 202916
list[409] = 202917
list[410] = 202918
list[411] = 202919
list[412] = 202921
list[413] = 202931
list[414] = 202941
list[415] = 202951
list[416] = 202961
list[417] = 202971
list[418] = 202981
list[419] = 202991
list[420] = 203021
list[421] = 203121
list[422] = 203201
list[423] = 203210
list[424] = 203211
list[425] = 203212
list[426] = 203213
list[427] = 203214
list[428] = 203215
list[429] = 203216
list[430] = 203217
list[431] = 203218
list[432] = 203219
list[433] = 203221
list[434] = 203231
list[435] = 203241
list[436] = 203251
list[437] = 203261
list[438] = 203271
list[439] = 203281
list[440] = 203291
list[441] = 203321
list[442] = 203421
list[443] = 203521
list[444] = 203621
list[445] = 203721
list[446] = 203821
list[447] = 203921
list[448] = 204021
list[449] = 204121
list[450] = 204201
list[451] = 204210
list[452] = 204211
list[453] = 204212
list[454] = 204213
list[455] = 204214
list[456] = 204215
list[457] = 204216
list[458] = 204217
list[459] = 204218
list[460] = 204219
list[461] = 204221
list[462] = 204231
list[463] = 204241
list[464] = 204251
list[465] = 204261
list[466] = 204271
list[467] = 204281
list[468] = 204291
list[469] = 204321
list[470] = 204421
list[471] = 204521
list[472] = 204621
list[473] = 204721
list[474] = 204821
list[475] = 204921
list[476] = 205021
list[477] = 205121
list[478] = 205201
list[479] = 205210
list[480] = 205211
list[481] = 205212
list[482] = 205213
list[483] = 205214
list[484] = 205215
list[485] = 205216
list[486] = 205217
list[487] = 205218
list[488] = 205219
list[489] = 205221
list[490] = 205231
list[491] = 205241
list[492] = 205251
list[493] = 205261
list[494] = 205271
list[495] = 205281
list[496] = 205291
list[497] = 205321
list[498] = 205421
list[499] = 205521
list[500] = 205621
list[501] = 205721
list[502] = 205821
list[503] = 205921
list[504] = 206021
list[505] = 206121
list[506] = 206201
list[507] = 206210
list[508] = 206211
list[509] = 206212
list[510] = 206213
list[511] = 206214
list[512] = 206215
list[513] = 206216
list[514] = 206217
list[515] = 206218
list[516] = 206219
list[517] = 206221
list[518] = 206231
list[519] = 206241
list[520] = 206251
list[521] = 206261
list[522] = 206271
list[523] = 206281
list[524] = 206291
list[525] = 206321
list[526] = 206421
list[527] = 206521
list[528] = 206621
list[529] = 206721
list[530] = 206821
list[531] = 206921
list[532] = 207021
list[533] = 207121
list[534] = 207201
list[535] = 207210
list[536] = 207211
list[537] = 207212
list[538] = 207213
list[539] = 207214
list[540] = 207215
list[541] = 207216
list[542] = 207217
list[543] = 207218
list[544] = 207219
list[545] = 207221
list[546] = 207231
list[547] = 207241
list[548] = 207251
list[549] = 207261
list[550] = 207271
list[551] = 207281
list[552] = 207291
list[553] = 207321
list[554] = 207421
list[555] = 207521
list[556] = 207621
list[557] = 207721
list[558] = 207821
list[559] = 207921
list[560] = 208021
list[561] = 208121
list[562] = 208201
list[563] = 208210
list[564] = 208211
list[565] = 208212
list[566] = 208213
list[567] = 208214
list[568] = 208215
list[569] = 208216
list[570] = 208217
list[571] = 208218
list[572] = 208219
list[573] = 208221
list[574] = 208231
list[575] = 208241
list[576] = 208251
list[577] = 208261
list[578] = 208271
list[579] = 208281
list[580] = 208291
list[581] = 208321
list[582] = 208421
list[583] = 208521
list[584] = 208621
list[585] = 208721
list[586] = 208821
list[587] = 208921
list[588] = 209021
list[589] = 209121
list[590] = 209201
list[591] = 209210
list[592] = 209211
list[593] = 209212
list[594] = 209213
list[595] = 209214
list[596] = 209215
list[597] = 209216
list[598] = 209217
list[599] = 209218
list[600] = 209219
list[601] = 209221
list[602] = 209231
list[603] = 209241
list[604] = 209251
list[605] = 209261
list[606] = 209271
list[607] = 209281
list[608] = 209291
list[609] = 209321
list[610] = 209421
list[611] = 209521
list[612] = 209621
list[613] = 209721
list[614] = 209821
list[615] = 209921
list[616] = 210021
list[617] = 210121
list[618] = 210201
list[619] = 210210
list[620] = 210211
list[621] = 210212
list[622] = 210213
list[623] = 210214
list[624] = 210215
list[625] = 210216
list[626] = 210217
list[627] = 210218
list[628] = 210219
list[629] = 210221
list[630] = 210231
list[631] = 210241
list[632] = 210251
list[633] = 210261
list[634] = 210271
list[635] = 210281
list[636] = 210291
list[637] = 210321
list[638] = 210421
list[639] = 210521
list[640] = 210621
list[641] = 210721
list[642] = 210821
list[643] = 210921
list[644] = 211021
list[645] = 212021
list[646] = 213021
list[647] = 214021
list[648] = 215021
list[649] = 216021
list[650] = 217021
list[651] = 218021
list[652] = 219021
list[653] = 220021
list[654] = 220121
list[655] = 220201
list[656] = 220210
list[657] = 220211
list[658] = 220212
list[659] = 220213
list[660] = 220214
list[661] = 220215
list[662] = 220216
list[663] = 220217
list[664] = 220218
list[665] = 220219
list[666] = 220221
list[667] = 220231
list[668] = 220241
list[669] = 220251
list[670] = 220261
list[671] = 220271
list[672] = 220281
list[673] = 220291
list[674] = 220321
list[675] = 220421
list[676] = 220521
list[677] = 220621
list[678] = 220721
list[679] = 220821
list[680] = 220921
list[681] = 221021
list[682] = 222021
list[683] = 223021
list[684] = 224021
list[685] = 225021
list[686] = 226021
list[687] = 227021
list[688] = 228021
list[689] = 229021
list[690] = 230021
list[691] = 230121
list[692] = 230201
list[693] = 230210
list[694] = 230211
list[695] = 230212
list[696] = 230213
list[697] = 230214
list[698] = 230215
list[699] = 230216
list[700] = 230217
list[701] = 230218
list[702] = 230219
list[703] = 230221
list[704] = 230231
list[705] = 230241
list[706] = 230251
list[707] = 230261
list[708] = 230271
list[709] = 230281
list[710] = 230291
list[711] = 230321
list[712] = 230421
list[713] = 230521
list[714] = 230621
list[715] = 230721
list[716] = 230821
list[717] = 230921
list[718] = 231021
list[719] = 232021
list[720] = 233021
list[721] = 234021
list[722] = 235021
list[723] = 236021
list[724] = 237021
list[725] = 238021
list[726] = 239021
list[727] = 240021
list[728] = 240121
list[729] = 240201
list[730] = 240210
list[731] = 240211
list[732] = 240212
list[733] = 240213
list[734] = 240214
list[735] = 240215
list[736] = 240216
list[737] = 240217
list[738] = 240218
list[739] = 240219
list[740] = 240221
list[741] = 240231
list[742] = 240241
list[743] = 240251
list[744] = 240261
list[745] = 240271
list[746] = 240281
list[747] = 240291
list[748] = 240321
list[749] = 240421
list[750] = 240521
list[751] = 240621
list[752] = 240721
list[753] = 240821
list[754] = 240921
list[755] = 241021
list[756] = 242021
list[757] = 243021
list[758] = 244021
list[759] = 245021
list[760] = 246021
list[761] = 247021
list[762] = 248021
list[763] = 249021
list[764] = 250021
list[765] = 250121
list[766] = 250201
list[767] = 250210
list[768] = 250211
list[769] = 250212
list[770] = 250213
list[771] = 250214
list[772] = 250215
list[773] = 250216
list[774] = 250217
list[775] = 250218
list[776] = 250219
list[777] = 250221
list[778] = 250231
list[779] = 250241
list[780] = 250251
list[781] = 250261
list[782] = 250271
list[783] = 250281
list[784] = 250291
list[785] = 250321
list[786] = 250421
list[787] = 250521
list[788] = 250621
list[789] = 250721
list[790] = 250821
list[791] = 250921
list[792] = 251021
list[793] = 252021
list[794] = 253021
list[795] = 254021
list[796] = 255021
list[797] = 256021
list[798] = 257021
list[799] = 258021
list[800] = 259021
list[801] = 260021
list[802] = 260121
list[803] = 260201
list[804] = 260210
list[805] = 260211
list[806] = 260212
list[807] = 260213
list[808] = 260214
list[809] = 260215
list[810] = 260216
list[811] = 260217
list[812] = 260218
list[813] = 260219
list[814] = 260221
list[815] = 260231
list[816] = 260241
list[817] = 260251
list[818] = 260261
list[819] = 260271
list[820] = 260281
list[821] = 260291
list[822] = 260321
list[823] = 260421
list[824] = 260521
list[825] = 260621
list[826] = 260721
list[827] = 260821
list[828] = 260921
list[829] = 261021
list[830] = 262021
list[831] = 263021
list[832] = 264021
list[833] = 265021
list[834] = 266021
list[835] = 267021
list[836] = 268021
list[837] = 269021
list[838] = 270021
list[839] = 270121
list[840] = 270201
list[841] = 270210
list[842] = 270211
list[843] = 270212
list[844] = 270213
list[845] = 270214
list[846] = 270215
list[847] = 270216
list[848] = 270217
list[849] = 270218
list[850] = 270219
list[851] = 270221
list[852] = 270231
list[853] = 270241
list[854] = 270251
list[855] = 270261
list[856] = 270271
list[857] = 270281
list[858] = 270291
list[859] = 270321
list[860] = 270421
list[861] = 270521
list[862] = 270621
list[863] = 270721
list[864] = 270821
list[865] = 270921
list[866] = 271021
list[867] = 272021
list[868] = 273021
list[869] = 274021
list[870] = 275021
list[871] = 276021
list[872] = 277021
list[873] = 278021
list[874] = 279021
list[875] = 280021
list[876] = 280121
list[877] = 280201
list[878] = 280210
list[879] = 280211
list[880] = 280212
list[881] = 280213
list[882] = 280214
list[883] = 280215
list[884] = 280216
list[885] = 280217
list[886] = 280218
list[887] = 280219
list[888] = 280221
list[889] = 280231
list[890] = 280241
list[891] = 280251
list[892] = 280261
list[893] = 280271
list[894] = 280281
list[895] = 280291
list[896] = 280321
list[897] = 280421
list[898] = 280521
list[899] = 280621
list[900] = 280721
list[901] = 280821
list[902] = 280921
list[903] = 281021
list[904] = 282021
list[905] = 283021
list[906] = 284021
list[907] = 285021
list[908] = 286021
list[909] = 287021
list[910] = 288021
list[911] = 289021
list[912] = 290021
list[913] = 290121
list[914] = 290201
list[915] = 290210
list[916] = 290211
list[917] = 290212
list[918] = 290213
list[919] = 290214
list[920] = 290215
list[921] = 290216
list[922] = 290217
list[923] = 290218
list[924] = 290219
list[925] = 290221
list[926] = 290231
list[927] = 290241
list[928] = 290251
list[929] = 290261
list[930] = 290271
list[931] = 290281
list[932] = 290291
list[933] = 290321
list[934] = 290421
list[935] = 290521
list[936] = 290621
list[937] = 290721
list[938] = 290821
list[939] = 290921
list[940] = 291021
list[941] = 292021
list[942] = 293021
list[943] = 294021
list[944] = 295021
list[945] = 296021
list[946] = 297021
list[947] = 298021
list[948] = 299021
list[949] = 302021
list[950] = 312021
list[951] = 320021
list[952] = 320121
list[953] = 320201
list[954] = 320210
list[955] = 320211
list[956] = 320212
list[957] = 320213
list[958] = 320214
list[959] = 320215
list[960] = 320216
list[961] = 320217
list[962] = 320218
list[963] = 320219
list[964] = 320221
list[965] = 320231
list[966] = 320241
list[967] = 320251
list[968] = 320261
list[969] = 320271
list[970] = 320281
list[971] = 320291
list[972] = 320321
list[973] = 320421
list[974] = 320521
list[975] = 320621
list[976] = 320721
list[977] = 320821
list[978] = 320921
list[979] = 321021
list[980] = 322021
list[981] = 323021
list[982] = 324021
list[983] = 325021
list[984] = 326021
list[985] = 327021
list[986] = 328021
list[987] = 329021
list[988] = 332021
list[989] = 342021
list[990] = 352021
list[991] = 362021
list[992] = 372021
list[993] = 382021
list[994] = 392021
list[995] = 402021
list[996] = 412021
list[997] = 420021
list[998] = 420121
list[999] = 420201
list[1000] = 420210
 
print(list[int(input())])