#include <iostream>
#include <string>

using namespace std;

int main() {
	int count = 0;
	string ans, s;
	cin >> ans;

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

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