dbbdc
129
a
aa
aaab
aab
aaba
aabb
aac
aaccd
aacdd
aad
aadbd
aadd
ab
abbb
abbc
abbdc
abcbb
abcda
abdd
acaa
acadd
acbba
acc
accda
ad
ada
adaa
adb
adc
b
ba
baac
bacab
bacca
baccc
bad
badc
badcb
bb
bbadc
bbb
bbba
bbbd
bbc
bbcbd
bbccb
bbcd
bbd
bbdaa
bbdb
bbdc
bc
bca
bcb
bcd
bcdda
bd
bdaab
bdac
bdadb
bdb
bdbc
bdc
bdccb
bdcda
bdcdd
bdda
c
cabab
cabb
cabcb
cac
cad
cadb
cadd
cb
cba
cbbb
cbbbd
cbca
cbcc
cbcdc
cbd
cc
cca
ccadd
ccbbc
ccd
cd
cdac
cdb
cdc
cdcb
cdd
cddd
d
da
daab
dabb
dabcb
dabcd
dabdd
dac
dad
dadc
db
dbb
dbbd
dbbdc
dbcd
dc
dca
dcadc
dcb
dcc
dcca
dccad
dccbb
dcd
dd
ddabb
ddadc
ddb
ddc
ddcaa
ddcc
ddd
dddda
ddddb