If your structure, "((...)..(((....)).))" means tree structure like s-expression in lisp, and "." matches any gene, "GAGGGUCCUUUCAGUAGCAC" could match 11 trees.
I don't know what is "hydrogen bonds", no knowledge for genes. I hope you to describe what you are going to do, and get help of monks.
sub parse() is a little modified one from kogai dan's example(written in japanese).
regards
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