#include <iostream>
#include <string>
int main() {
	std::string S;
	std::string Answer = "yukicoder";
	std::cin >> S;
	for (int i = 0; i < S.size(); i++) {
		if (S.at(i) == '?') {
			std::cout << Answer.at(i) << std::endl;
		}
	}
	return 0;
}