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  1. or download this
    my $newfile = undef;
    eval {
    ...
    die "$@" if ($@ and !defined($newfile));
    if (defined($newfile)) {print "$base has something new in it\n";}
    else {print "$base is just old stuff\n";}
    
  2. or download this
    @/=map{[/./g]}qw/.h_nJ Xapou cets krht ele_ r_ra/;
    map{y/X_/\n /;print}map{pop@$_}@/for@/