#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <stdlib.h>

int main(void){
	char s[20];
	int i,j;
	scanf("%s",s);
	for(i=0;i<10;i++){
		if(s[i]=='?'){
			j=i;
		}
	}
	switch(j){
	case 0:
		printf("y\n");
		break;
	case 1:
		printf("u\n");
		break;
	case 2:
		printf("k\n");
		break;
	case 3:
		printf("i\n");
		break;
	case 4:
		printf("c\n");
		break;
	case 5:
		printf("o\n");
		break;
	case 6:
		printf("d\n");
		break;
	case 7:
		printf("e\n");
		break;
	case 8:
		printf("r\n");
		break;
	}
	return 0;
}