#!/usr/bin/evn perl

use strict;
use warnings;

my $s = <>;
chomp $s;
my $g;
if($s eq 'oda') {
	$g = 'yukiko';
} else {
	$g = 'oda';
}
my $c = 0;
for(my $i = 0; $i < 8; $i++) {
	my $str = <>;
	my @array = split //, $str;
	for(my $j = 0; $j < 8; $j++) {
		if(($array[$j] eq 'b')or($array[$j] eq 'w')){
			$c++;
		}
	}
}

if($c % 2 == 0) {
	print "$s\n";
} else {
	print "$g\n";
}

exit;