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    Variable "$CONFIG" is not imported at ./Chapter9_Exer3 line 15.
Variable "$OUTPUT" is not imported at ./Chapter9_Exer3 line 20.
Global symbol "$CONFIG" requires explicit package name at ./Chapter9_E
+xer3 line 15.
Global symbol "$OUTPUT" requires explicit package name at ./Chapter9_E
+xer3 line 20.
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    syntax error at ./Chapter9_Exer3 line 8, near "'three_Freds.out':"
Can't use global $0 in "my" at ./Chapter9_Exer3 line 12, near "Usage: 
+$0"