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