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