1 0
2 [2, 18]
2 1
3 [2, 18]
3 1
4 [2, 18]
4 1
5 [2, 18]
5 1
6 [6, 17]
6 [2, 18]
6 [6, 17]
6 3
7 [6, 17]
7 [2, 18]
7 [6, 17]
7 3
8 [8, 12]
8 [6, 17]
8 [2, 18]
8 [6, 17]
8 [8, 9]
8 5
9 [8, 12]
9 [9, 15]
9 [6, 17]
9 [2, 18]
9 [6, 17]
9 [8, 9]
9 6
10 [8, 12]
10 [9, 15]
10 [6, 17]
10 [2, 18]
10 [6, 17]
10 [10, 13]
10 6
11 [11, 13]
11 [8, 12]
11 [9, 15]
11 [6, 17]
11 [2, 18]
11 [11, 20]
11 [6, 17]
11 [10, 13]
11 8
12 [11, 13]
12 [8, 12]
12 [9, 15]
12 [6, 17]
12 [2, 18]
12 [11, 20]
12 [6, 17]
12 [10, 13]
12 8
13 [11, 13]
13 [9, 15]
13 [6, 17]
13 [13, 18]
13 [2, 18]
13 [11, 20]
13 [6, 17]
13 [10, 13]
13 8
14 [9, 15]
14 [6, 17]
14 [13, 18]
14 [2, 18]
14 [11, 20]
14 [6, 17]
14 6
15 [9, 15]
15 [6, 17]
15 [13, 18]
15 [2, 18]
15 [11, 20]
15 [6, 17]
15 6
16 [6, 17]
16 [13, 18]
16 [2, 18]
16 [11, 20]
16 [6, 17]
16 5
17 [6, 17]
17 [13, 18]
17 [2, 18]
17 [11, 20]
17 [6, 17]
17 5
18 [13, 18]
18 [2, 18]
18 [11, 20]
18 3
19 [11, 20]
19 1
8