my @special_chars = (":", ";", ",", "=", "-");

##</code><code>##

/a/b/c/d/e/fi:le
/a/b/c/d/e/fi:l;e
/a/b/c/d/e/f-i:l;e
/a/b/c/d/e/f-i-:l;e
/a/b/c/d/e/f:i-:l;e

##</code><code>##

/a/b/c/d/e/fi le
/a/b/c/d/e/fi l e
/a/b/c/d/e/f i l e
/a/b/c/d/e/f i  l e

##</code><code>##

/a/b/c/d/e/f-i:l;e
/a/b/c/d/e/fai:l;e
/a/b/c/d/e/fai:lbe