#include<iostream>
#include<string>

int main(){
	std::string s;
	std::cin >> s;
	int cnt = 0;
	for (int i = 0; i < 8; ++i){
		std::string gyou;
		std::cin >> gyou;
		for (int j = 0; j < 8; ++j)
		if (gyou[j] != '.')cnt++;
	}
	if (cnt % 2 == 0)std::cout << s << std::endl;
	else {
		if (s == "yukiko")std::cout << "oda" << std::endl;
		else std::cout << "yukiko" << std::endl;
	}
	return 0;
}