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