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  1. or download this
    my @fields = qw(a b c);
    my @input = qw( 5.5 3.2 15.0 -22 .02 .15);
    ...
    }
    
    printf "%.1f\t%.1f\t%.1f\n", $hash{a}{1}, $hash{b}{1}, $hash{c}{1};