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