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