#include <iostream>
#include <algorithm>
#include <cstring>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <cmath>

#define AS(a) (sizeof(a)/sizeof(a[0]))
using namespace std;
long long int MOD = 1000000007;
long long int INF = 1000000007;


int main() {
  string S = "yukicoder";
  string A;
  cin >> A;
  for(int i = 0; i < S.length(); i++) {
    if(S[i] != A[i]) {
      cout << S[i] << endl;
    }
  }
}