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