#include <iostream>
#include <algorithm>
#include <vector>
#include<string>

using namespace std;
int main(){
	string m = "yukicoder";
	string s;
	cin >> s;
	for (int i = 0; i < s.size(); i++) {
		if (s[i] != m[i]) {
			cout << m[i] << endl;
		}
	}
}