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