It incorectly matches "C" in "-C-". (Two chars minimum.) 

$_ = '---LL--C----LCSH-------CSHL-------LCSLH-------LCCHLSHCL----';
while (m/([A-Z]+)/g) {
    ($s = $1) =~ s/^L+|L+$//g;
    print "$s\n" if length $s >= 2;
}

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In reply to Re^2: Regexp: How to match in middle but not the ends? by ikegami
in thread Regexp: How to match in middle but not the ends? by cormanaz

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