#include "bits/stdc++.h"
using namespace std;
#define Would
#define you
const int INF = 999999999;
const int MOD = 1e9 + 7;
const double pi = 3.141592653589793238;

int ans;
int main() {
	string h;
	char k[10][10];
	cin >> h;
	for (int i = 0; i < 8; ++i) {
		for (int j = 0; j < 8; ++j) {
			cin >> k[i][j];
			if (k[i][j] != '.') { ++ans; }
		}
	}
	if (ans % 2 == 0) { cout << h << endl; }
	else {
		if (h == "yukiko") { cout << "oda" << endl; }
		else { cout << "yukiko" << endl; }
	}
}