#include<stdio.h>

int main(void){
  int i;
  char S[10];
  char s[10] = "yukicoder";
  scanf("%s", S);
  for(i = 0; s[i] != '\0'; i++){
    if(S[i] != s[i]) printf("%c\n", s[i]);
  }
  return 0;
}