#include <bits/stdc++.h>
using namespace std;

int main()
{
int i;
int j;
int N;
int iSum;
char lpName[ 100 ];
char B[ 10 ];

	cin >> lpName;

	iSum = 0;
	for( i = 0; i < 8; i++ )
	{
		cin >> B;
		for( j = 0; j < 8; j++ )
		{
			if( B[ j ] != '.' ) iSum++;
		}
	}

	if( iSum % 2 == 0 )
		cout << lpName << endl;
	else
	{
		if( lpName[ 0 ] == 'y' )
			cout << "oda" << endl;
		else
			cout << "yukiko" << endl;
	}

	return 0;
}