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