COMMENT ⊗   VALID 00002 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	BEGIN "A"
C00003 ENDMK
C⊗;
BEGIN "A"
DEFINE DI="";
INTEGER X;DI;
BEGIN "B"
INTEGER Y;DI;
BEGIN "C"
INTEGER Z;DI;
I←1;
END;
I←2;
END;
I←3;
END;