#include<iostream>
#include<string>

using namespace std;

int main()
{
	string S;
	string B[8];

	cin >> S;

	for (int i = 0; i < 8; i++){
		cin >> B[i];
	}

	int count = 0;
	for (int i = 0; i < 8; i++){
		for (int j = 0; j < 8; j++){
			if (B[i][j] == 'w' || B[i][j] == 'b'){
				count++;
			}
		}
	}

	if (S == "oda" && count % 2 == 0)
		cout << "oda" << endl;
	else if (S == "oda" && count % 2 == 1)
		cout << "yukiko" << endl;
	if (S == "yukiko" && count % 2 == 0)
		cout << "yukiko" << endl;
	else if (S == "yukiko" && count % 2 == 1)
		cout << "oda" << endl;
}