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