The UNSTRING statement causes contiguous data in a sending
field to be separated and placed into multiple receiving fields.
UNSTRING identifier-1
[ DELIMITED [ BY ] [ ALL ] { identifier-2 }
{ literal-2 }
[ OR [ ALL ] { identifier-3 } ] ... ]
{ listeral-3 }
INTO { identifier-4 [ DELIMITER IN identifier-5 ]
[ COUNT IN identifier-6 ] } ...
[ WITH POINTER identifier-7 ]
[ TALLYING IN identifier-8 ]
[ [ ON ] OVERFLOW imperative-statement-1 ]
[ NOT [ ON ] OVERFLOW imperative-statement-2 ]
[ END-UNSTRING ]