#include<iostream>
#include<string>

using namespace std;

int main()
{
	string S1, S2;
	char B;

	cin >> S1;
	S2 = S1 == "oda" ? "yukiko" : "oda";

	int count = 0;
	for (int i = 0; i < 64; i++){
		cin >> B;
		count += (B != '.') ? 1 : 0;
	}

	cout << ((count % 2 == 0) ? S1 : S2) << endl;
}