Could a regexp Monk help me out?

I have long strings built of the character class [\-LCHS], and they are mostly \-. I want to loop through these strings and find maximal sets of two or more of the capital letters that do not begin or end with L. So for example

my $string = '---LL--C----LCSH-------CSHL-------LCSLH-------LCCHLSHCL-
+---';
while ($string =~ /[CSH][CSHL]+/g) {
    print "$&, ";
}

[download]

The output I want from this is: CSH, CSH, CSLH, CCHLSHC. But currently is messes up the 2nd and 4th strings by including an L at the end.

I have been scratching my head over this for quite a while. I can exclude an L at the beginning or the end. But since the L can be legal in the the middle, I can't figure out how to exclude it on the other end also.

Thanks....

Steve

In reply to Regexp: How to match in middle but not the ends? by cormanaz

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