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