#include <iostream>
#include <string>
#include <math.h>
#include <vector>
#include<stdio.h>
#include<algorithm>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n)  FOR(i,0,n)
#define all(x) (x).begin(),(x).end()
typedef long long ll;
#define SZ(x) ((int)(x).size())

using namespace std;

int main(){
	string s;
	cin >> s;
	switch ((int)s.find("?")) {
	case 0:
		cout << "y" << endl;
		break;
	case 1:
		cout << "u" << endl;
		break;
	case 2:
		cout << "k" << endl;
		break;
	case 3:
		cout << "i" << endl;
		break;
	case 4:
		cout << "c" << endl;
		break;
	case 5:
		cout << "o" << endl;
		break;
	case 6:
		cout << "d" << endl;
		break;
	case 7:
		cout << "e" << endl;
		break;
	case 8:
		cout << "r" << endl;
		break;
	}
	
	
	return 0;
}