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