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