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  1. or download this
    A       crap
    B       crap
    C       crap
    D       crap
    E       crap
    
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    A       crap    B       C       crap    D       crap    crap    E
    1       2       3       4       5       6       7       8       9
    11      12      13      14      15      16      17      18      19
    21      22      23      24      25      26      27      28      29
    
  3. or download this
    open IN, "<file1" or die $!;
    while(<IN>){
    ...
            print join "\t", @a[@cols],"\n";
    }
    close IN;
    
  4. or download this
    1       3       4       6       9
    11      13      14      16      19
    21      23      24      26      29