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