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