1⁄6 + 5⁄7
5⁄7 + 3⁄4
3⁄7 + 1⁄3
2⁄7 + 2⁄9
2⁄9 + 1⁄6
8⁄9 + 1⁄2
1⁄3 + 5⁄6
1⁄8 + 2⁄5
3⁄4 + 1⁄2
7⁄9 + 1⁄3
2⁄3 + 1⁄2
1⁄2 + 1⁄4