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