#include <iostream>
#include <string>

using namespace std;

int main() {
	string name;
	cin >> name;

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

	int count = 0;
	for (int i = 0; i < 8; i++) {
		for (int j = 0; j < 8; j++) {
			if (data[i][j] !=  '.') {
				count++;
			}
		}
	}

	if (name == "oda") {
		if (count % 2 == 0) {
			cout << "oda" << endl;
		} else {
			cout << "yukiko" << endl;
		}
	} else {
		if (count % 2 == 0) {
			cout << "yukiko" << endl;
		} else {
			cout << "oda" << endl;
		}
	}

	return 0;
}