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