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