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