#include <bits/stdc++.h>

using namespace std;

int main() {
	string s; cin >> s;
	int t0 = s != "oda";
	string name[2] = {"oda", "yukiko"};
	int cnt = 0;
	for (int i = 0; i < 8; ++i) {
		string str; cin >> str;
		for (int j = 0; j < 8; ++j) {
			cnt += str[j] != '.';
		}
	}
	cnt -= 4;
	cout << name[(t0 + cnt) % 2] << endl;
}