#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

long long MOD = 1000000007;

int main() {
    
    string S1 = "yukicoder";
    string S2;
    cin >> S2;
    for ( int i = 0; i < S2.length(); i++ ) {
        if ( S2[i] == '?' ) { cout << S1[i] << endl; }
    }
    
    
    return 0;
}