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