STRIP(string[,[option][,char]])

Up to three parameters may be supplied. The first is a string upon which
the operation is performed - this normally consists of stripping leading
and trailing spaces. The second parameter, if supplied, must start with
one of the letters "L", "T" or "B". This means strip leading spaces,
trailing spaces, or both, respectively. The third parameter, if
supplied, must be a single character, in which case this character is
stripped instead of spaces.

Example: strip("000123450","l","0") = "123450"