RosettaCodeData/Task/ABC-problem/ERRE/abc-problem.erre

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PROGRAM BLOCKS
!$INCLUDE="PC.LIB"
PROCEDURE CANMAKEWORD(WORD$)
LOCAL B$,P%
B$=BLOCKS$
PRINT(WORD$;" -> ";)
P%=INSTR(B$,CHR$(ASC(WORD$) AND $DF))
WHILE P%>0 AND WORD$>"" DO
CHANGE(B$,P%-1+(P% MOD 2),".."->B$)
WORD$=MID$(WORD$,2)
EXIT IF WORD$=""
P%=INSTR(B$,CHR$(ASC(WORD$) AND $DF))
END WHILE
IF WORD$>"" THEN PRINT("False") ELSE PRINT("True") END IF
END PROCEDURE
BEGIN
BLOCKS$="BOXKDQCPNAGTRETGQDFSJWHUVIANOBERFSLYPCZM"
CANMAKEWORD("A")
CANMAKEWORD("BARK")
CANMAKEWORD("BOOK")
CANMAKEWORD("TREAT")
CANMAKEWORD("COMMON")
CANMAKEWORD("SQUAD")
CANMAKEWORD("Confuse")
END PROGRAM