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