#include<iostream>
#include<algorithm>
#include<stdio.h>
#include<stdlib.h>
#include<vector>
#include<string>
#include<sstream>
#include<math.h>
using namespace std;


int main(){

  string s;
  cin >> s;

  string t;
  if( s == "oda" ) t = "yukiko";
  else t = "oda";

  vector<string> b(8);
  int cnt = 0;
  for(int i=0; i<8; i++){
    cin >> b[i];
    for(int j=0; j<8; j++){
      if( b[i][j] != '.' ) cnt++;
    }
  }

  if( cnt % 2 == 0 ) cout << s << endl;
  else cout << t << endl;

  return 0;
}