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