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        my @x = uniq 1, 1, 2, 2, 3, 5, 3, 4; # returns 1 2 3 5 4
        my $x = uniq 1, 1, 2, 2, 3, 5, 3, 4; # returns 5

use strict;
use List::MoreUtils qw/uniq/;

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