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