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