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