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