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