30
18 21 23 16 29 22 27 28 17 30 26 24 19 20 25 
23 27 30 20 21 17 18 19 22 24 16 26 25 29 28 
25 23 19 18 16 26 27 30 21 17 20 24 22 28 29 
24 19 27 18 17 25 21 23 29 16 22 28 20 26 30 
25 22 26 21 23 28 19 27 30 16 24 17 20 29 18 
29 27 26 25 18 19 30 21 23 17 16 22 28 20 24 
27 18 17 30 23 25 22 21 19 20 24 28 16 26 29 
21 30 23 17 22 27 24 19 29 26 18 28 16 25 20 
30 19 24 29 21 20 18 16 27 17 23 26 28 22 25 
16 26 25 18 19 20 30 24 27 17 28 22 21 23 29 
16 23 28 30 24 27 26 22 29 20 19 21 17 18 25 
23 16 17 20 25 27 21 28 19 26 30 22 18 24 29 
25 21 24 29 19 16 17 28 18 30 22 20 27 23 26 
27 21 24 23 30 29 16 26 25 22 18 28 17 19 20 
23 17 21 29 19 25 16 28 30 26 20 27 18 22 24 
6 10 2 3 5 15 9 1 4 12 7 13 8 14 11 
5 10 8 2 9 14 4 1 7 13 6 11 15 3 12 
5 9 15 4 8 10 1 3 12 2 14 13 6 7 11 
1 15 10 3 2 7 11 6 4 5 13 12 9 8 14 
8 4 15 12 14 5 10 11 1 7 9 6 13 3 2 
12 1 2 5 6 9 15 3 8 11 14 4 13 10 7 
3 10 11 7 15 13 1 9 4 5 12 6 8 2 14 
13 7 3 4 2 15 5 6 14 12 10 11 9 1 8 
12 6 2 1 10 8 7 9 14 3 13 5 4 15 11 
5 1 13 15 14 7 3 2 10 12 4 9 8 11 6 
10 1 11 14 7 3 15 5 13 6 8 2 9 4 12 
13 15 7 11 9 2 1 8 12 3 5 10 6 4 14 
2 8 3 1 13 4 10 15 11 12 6 7 9 5 14 
9 10 11 15 3 14 5 2 6 1 4 8 13 7 12 
14 2 6 15 12 13 7 1 4 9 10 3 11 5 8 
forbidden 1 16
forbidden 1 22
forbidden 1 24
forbidden 1 27
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forbidden 2 16
forbidden 2 18
forbidden 2 24
forbidden 2 25
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forbidden 2 27
forbidden 3 19
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forbidden 3 27
forbidden 3 29
forbidden 3 30
forbidden 4 22
forbidden 4 23
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forbidden 5 19
forbidden 5 20
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forbidden 6 17
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forbidden 7 16
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forbidden 8 18
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forbidden 9 16
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forbidden 12 17
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forbidden 13 30
forbidden 14 16
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forbidden 15 26
forbidden 15 27