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