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