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    use warnings;
use strict;
...
1219303436
1729313449
1015162331
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    for my $column (0 .. 4) {
    my @byColumn = map {$_->[$column]} @lines;
    print "@byColumn\n";
}
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    09 07 06 06 12 17 10
12 25 08 22 19 29 15
20 28 29 42 30 31 16
37 46 41 43 34 34 23
49 48 49 47 36 49 31