pcut

#!/usr/bin/perl
use Getopt::Std;

my %opt;
getopts('f:d:',\%opt);
my $delim = $opt{d} || '\s';

my @flist;
if( $opt{f} =~ /^-?\d+$/) {
  @flist = ($opt{f});
}
elsif( $opt{f} =~ /^(\d+)-(\d+)$/ ) {
  @flist = $1..$2;
}
elsif( $opt{f} =~ /^(\d+)-$/ ) {
  @flist = ($1);
  $openend = 1;
}

while(<>) {
  @f = split /$delim+/,$_;
  @fields = $openend ? ($flist[0]..$#f) : @flist;
  print join(' ',@f[@flist]);
  print "\n";
}