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