> Check perldoc perlre, "Regular Expressions":
>
> " The following standard quantifiers are
> recognized:
> [...]
> {n} Match exactly n times
> {n,} Match at least n times
> {n,m} Match at least n but not more than
> m times
> "
>
> "\2{3,}" in your regexp means that what "[gatc]{3}"
> matched should at least
> match three times.
>
> Dani
Thank you very much,
Li
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