#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <utility>
#include <iomanip>
using namespace std;

int main(void) {
	string yuki = { "yukicoder" };
	string str;
	cin >> str;
	for (int i = 0; i < str.size(); i++) {
		if (yuki[i] != str[i])	cout << yuki[i] << endl;
	}
	return 0;
}