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