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