- Parse >A B< Text_A Text_B,                     - (
  Subtract >C< A B,                                  Text_A && Text_B >>
  Pack >Values< C                                    (
  [ Text_A && Text_B ]                                 - Parse >A B< Text_A Text_B,
+ Ec <>                                                  Subtract >C< A B,
  Handle Ec                                              Pack >Values< C 
;                                                      + Ec <>
                                                         Handle Ec
                                                       ;
                                                     )

                                                     >> _
                                                   )





