#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
typedef long long ll;

int main(){
  string y = "yukicoder";
  string s;
  cin >> s;
  FOR(i,0,y.length()){
    if(y[i]!=s[i]){
      cout << y[i] << endl;
    }
  }
  return 0;
}