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