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