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