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