#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <queue>
#include <numeric>
#include <climits>
using namespace std;
using ll = long long;
const ll mod = 1000000007;
int n, W;
string s, t;
string str = "yukicoder";
int main() {
	cin >> s;
	for (int i = 0; i < s.size(); ++i) {
		if (s[i] == '?') cout << str[i] << endl;
	}
	return 0;
}