40 lines
661 B
Perl
40 lines
661 B
Perl
use 5.20.0;
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use warnings;
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my @items = <>;
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use List::AllUtils qw/ pairwise /;
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use experimental qw/
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signatures
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postderef
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current_sub
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/;
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while( my $next = shift @items ) {
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my $match = find([ split '', $next], @items) or next;
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say $match;
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last;
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}
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sub find( $next, @items ) {
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my $contender = splice @_, 1, 1 or return;
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$contender = [ split '', $contender ];
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my $diff = 0;
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my $r = '';
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for my $i ( 0..$next->@* ) {
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if ( $next->[$i] eq $contender->[$i] ) {
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$r .= $next->[$i];
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}
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else {
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last if $diff++;
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}
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}
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return $r if $diff == 1;
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goto __SUB__;
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}
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