/* -*- coding: utf-8 -*-
 *
 * 88.cc: No.88 次はどっちだ - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int N = 8;

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  string bs;
  cin >> bs;

  string ws = (bs == "oda") ? "yukiko" : "oda";

  int bw = 0;
  for (int y = 0; y < N; y++) {
    string t;
    cin >> t;
    for (int x = 0; x < N; x++)
      if (t[x] != '.') bw++;
  }

  if (! (bw & 1)) cout << bs << endl;
  else cout << ws << endl;
  return 0;
}