/SPLIT
* /SPLIT ( a m a+i m-i -- a+i m-i a i )

Split a character string _a m_ at place given by _a+i m-i_.
Called "cut-split" because "slash-split" is a tongue
twister.
 : /SPLIT  DUP >R  2SWAP  R> - ;

FORTH/DEF toolbelt ordinary primitive