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