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