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