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#! /usr/bin/perl
use warnings;
...
my $comb = 'Math::Combinatorics'->new(count => 4, data => [ 0 .. 9 ]);
++$count, say @$_ while @$_ = $comb->next_combination;
say $count;

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,