20
17 11 20 19 13 12 18 15 16 14 
16 15 17 20 11 19 14 13 12 18 
11 13 18 16 14 20 15 19 17 12 
15 11 12 20 14 19 13 16 18 17 
11 12 16 14 17 19 13 15 18 20 
12 17 20 14 19 15 13 11 16 18 
12 20 19 18 14 17 16 11 15 13 
18 16 15 12 11 19 17 14 20 13 
13 20 19 15 17 11 12 16 18 14 
17 11 16 18 19 15 13 12 20 14 
4 10 5 1 6 9 8 3 2 7 
8 3 2 5 10 1 6 7 9 4 
1 10 3 9 6 7 4 5 2 8 
1 2 5 8 9 7 3 10 4 6 
8 10 1 6 7 3 9 5 4 2 
6 5 9 1 8 10 7 2 3 4 
6 8 2 1 3 4 10 7 5 9 
10 2 1 8 5 4 6 7 9 3 
4 5 1 3 7 10 6 2 9 8 
2 5 6 8 1 4 7 10 3 9 
forbidden 1 11
forbidden 1 12
forbidden 1 13
forbidden 1 14
forbidden 1 15
forbidden 1 17
forbidden 1 19
forbidden 2 12
forbidden 2 14
forbidden 2 15
forbidden 2 16
forbidden 2 18
forbidden 2 19
forbidden 3 12
forbidden 3 13
forbidden 3 14
forbidden 3 15
forbidden 3 16
forbidden 3 17
forbidden 3 18
forbidden 3 19
forbidden 4 12
forbidden 4 14
forbidden 4 15
forbidden 4 16
forbidden 4 17
forbidden 4 18
forbidden 5 11
forbidden 5 12
forbidden 5 15
forbidden 5 16
forbidden 5 17
forbidden 5 18
forbidden 5 19
forbidden 6 11
forbidden 6 14
forbidden 6 15
forbidden 6 16
forbidden 6 18
forbidden 6 19
forbidden 6 20
forbidden 7 12
forbidden 7 13
forbidden 7 14
forbidden 7 15
forbidden 7 16
forbidden 7 20
forbidden 8 12
forbidden 8 13
forbidden 8 15
forbidden 8 17
forbidden 8 18
forbidden 8 19
forbidden 8 20
forbidden 9 11
forbidden 9 13
forbidden 9 15
forbidden 9 17
forbidden 9 18
forbidden 9 19
forbidden 10 14
forbidden 10 15
forbidden 10 16
forbidden 10 17
forbidden 10 19
forbidden 10 20