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