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  1. or download this
    Global symbol "$file1" requires explicit package name (did you forget 
+to declare "my $file1"?) at sid.pl line 5.
Can't find string terminator "END1" anywhere before EOF at sid.pl line
+ 5.
  2. or download this
       open(my $f3, ">", "C:/Users/Siddharth/Desktop/two.txt")
    or die "Can't open < input.txt: $!";