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Task/ABC-Problem/BBC-BASIC/abc-problem.bbc

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+      BLOCKS$="BOXKDQCPNAGTRETGQDFSJWHUVIANOBERFSLYPCZM"
+      PROCcan_make_word("A")
+      PROCcan_make_word("BARK")
+      PROCcan_make_word("BOOK")
+      PROCcan_make_word("TREAT")
+      PROCcan_make_word("COMMON")
+      PROCcan_make_word("SQUAD")
+      PROCcan_make_word("Confuse")
+      END
+
+      DEF PROCcan_make_word(word$)
+      LOCAL b$,p%
+      b$=BLOCKS$
+      PRINT word$ " -> ";
+      p%=INSTR(b$,CHR$(ASCword$ AND &DF))
+      WHILE p%>0 AND word$>""
+        MID$(b$,p%-1+(p% MOD 2),2)=".."
+        word$=MID$(word$,2)
+        p%=INSTR(b$,CHR$(ASCword$ AND &DF))
+      ENDWHILE
+      IF word$>"" PRINT "False" ELSE PRINT "True"
+      ENDPROC