#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

void solve() {
  int N, cnt = 0;
  string name, s;
  vector<string> ans{"oda", "yukiko"};
  cin >> name;
  if (name != ans[0]) swap(ans[0], ans[1]);
  rep(i, 0, 8) {
    cin >> s;
    rep(j, 0, 8) if (s[j] != '.') cnt++;
  }
  cout << ans[(cnt % 2)] << endl;
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  solve();
  getchar();
}