15 20
1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575 1048575
1 6
1 7
1 15
2 4
2 8
3 13
4 5
5 10
6 9
7 10
8 13
9 11
12 14
14 15
