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