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