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