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