#include <iostream>
#include <string>
using namespace std;

#define rep(i, n) for (int i = 0; i < n; i++)

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

	int cnt = 0;
	rep(i, 8)
	{
		string B;
		cin >> B;
		rep(j, 8)
		{
			cnt = B[j] == '.' ? cnt : cnt + 1;
		}
	}
	if (cnt % 2 == 0)
	{
		cout << S;
	}
	else
	{
		if (S == "oda")
		{
			cout << "yukiko";
		}
		else
		{
			cout << "oda";
		}
	}
}