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INDEX()

  FUNCTION: index(<list>,<character>,<first>,<length>)

  This function is similar to EXTRACT(), except that an item in the
  list may be more than one word; instead of a space being used to
  separate items in the list, <character> is used. The function returns
  <length> items starting from that in the <first> position. Trailing
  spaces are trimmed. The comma cannot be used as the <character> separator.

  Example:
    > say [index(Cup of Tea | Mug of Beer | Glass of Wine, |, 2, 1)]
    You say, "Mug of Beer"

  Related Topics: extract().