#include <iostream>
using namespace std;
int main(){
  string s;
  cin >> s;
  string str;
  int n=0;
  for(int i=0;i<8;i++){
    cin >> str;
    for(int j=0;j<8;j++){
      if(str[j]!='.')n++;
    }
  }
  if(n%2==0)cout << s << endl;
  else if(s=="oda")cout << "yukiko" << endl;
  else cout << "oda" << endl;

  return 0;
}