chomp(my $black = <STDIN>);
my $white = ($black eq 'oda') ? 'yukiko' : 'oda';
my $total = 0;
foreach (1..8) {
    chomp($_ = <STDIN>);
    my @array = split('', $_);
    $total += scalar(grep {$_ eq 'b' || $_ eq 'w'} @array);
}
print(($total%2 == 0) ? $black : $white);
print "\n";