>r1 5' adapter and 3' adapter
AAAAAAAAAACCCCCCCCCCTTTTTTTTTTGGGGGGG
>r2 without any adapter
GGGGGGGGGGGGGGGGGGG
>r3 5' adapter, partial 3' adapter
CCCGGCCCCC
>r4 only 3' adapter
GGGGGGGGGGCCCCCCCCCCTTTTTTTTTTGGGGGGG
>r5 only 5' adapter
AAAAAAAAAACCCCCCCCCCGGGGGGG
>r6 partial 5' adapter
AAAAAACCCCCCCCCCTTTTTTTTTTGGGGGGG
>r7 5' adapter plus preceding bases
AACCGGTTTTAAAAAAAAAACCCCCCCCCCTTTTTTTTTTGGGGGGG
