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