#include<cstdio>
#include <iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

#define mod (ll)(1e9+7);

using namespace std;
typedef long long ll;
typedef pair<ll, ll> Pr;

string s,str;

int main()
{
	cin >> s;
	str = "yukicoder";
	for (int i = 0; i < s.size(); i++) {
		if (s[i] == '?') 
			cout << str[i] << endl;
	}
	return	0;
}