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