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