#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

inline string opp(string s) {
  if (s == "oda") return "yukiko";
  return "oda";
}

int main() {
  string s;
  cin >> s;
  constexpr int n = 8;
  vector Grid(n, vector<char>(n));
  rep(i, n) rep(j, n) cin >> Grid[i][j];
  int cnt = 0;
  rep(i, n) rep(j, n) if (Grid[i][j] != '.') cnt++;
  cout << (cnt % 2 == 0 ? s : opp(s)) << endl;
  return 0;
}