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KARSWP

       SUBROUTINE KARSWP (TEXTA,LOCA,TEXTB,LOCB,LENGTH)

          Given   two    character   strings    defined    by
 TEXTA,LOCA,LENGTH   and  TEXTB,LOCB,LENGTH,   swap  them  in
 memory.  If any of LOCA,  LOCB, or LENGTH is less than 1, no
 action is taken.