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