# dependent on input length. This module on the other hand is free
# from such limitation.
-$output=pop;
-open STDOUT,">$output";
+$output=pop and open STDOUT,">$output";
($OUT,$INP,$LEN,$KEYB,$COUNTERA)=("A4","B4","A6","B6","A8");
($KEYA,$COUNTERB,$STEP)=("A7","B7","A3");