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