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 GT_ASCIISUM()        Sum the ascii values in a string.
 GT_ASCPOS()          Return the ascii value of a specified character in a string
 GT_ATDIFF()          Return the position where two strings begin to differ
 GT_CHAREVEN()        Return a string of all the characters in even positions
 GT_CHARMIX()         Amalgamate two strings to form the return value
 GT_CHARODD()         Return a string of all the characters in odd positions
 GT_CHRCOUNT()        Count the number of times a character appears in a string
 GT_CHRFIRST()        Find which character occurs first in a string
 GT_CHRTOTAL()        Find number of times a set of characters appears in a string
 GT_STRCOUNT()        Count the number of times a substring appears in a string
 GT_STRCSPN()         Return length of prefix in string of chars NOT in set.
 GT_STRDIFF()         Return a string where it begins to differ from another
 GT_STREXPAND()       Insert fillers between characters in a passed string
 GT_STRLEFT()         Find length of prefix of a string
 GT_STRPBRK()         Return string after 1st char from a set
 GT_STRRIGHT()        Find length of a suffix of a string