#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3f
#define MOD 1000000007
#define EPS (1e-10)
using namespace std;
typedef long long ll;
typedef pair<int,int>P;

signed main(){
	string s;cin>>s;
	string t="yukicoder";
	rep(i,s.size()){
		if(s[i]!=t[i]){
			cout<<t[i]<<endl;
		}
	}
}