{15-16-17}-6-{15-16-17}

{3-4-17}-6-{3-4-17}

{2-4-6}-{2-18}-{2-6}

18-6-17-5-17-5-6-4

{15-16-17}-6-{15-16-17}

{3-4-17}-6-{3-4-17}

{1-14-17-6}-18-6

17-18-19-9-{17-18-19-9}

20-8-20-8

8-19-8-19

19-7-19-7

7-18

6-6-20-8-8-19

6-4-2-6-18-6

{4-17}-{2-4-15}-{3-4-17}