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