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