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