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