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