#include <stdio.h>
int main(void){
    int i;
    char a;
  for(i=0;i<10;i++){
     if(getchar()=='?')
     break;
  }
  switch(i){
      case 0:
     a='y';
     break;
      case 1:
     a='u';
     break;
      case 2:
     a='k';
     break;
      case 3:
     a='i';
     break;
      case 4:
     a='c';
     break;
      case 5:
     a='o';
     break;
      case 6:
     a='d';
     break;
      case 7:
     a='e';
     break;
      default:
     a='r';
     break;
     
  }printf("%c\n",a);
}