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