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