#include <bits/stdc++.h>
using namespace std;
int main(){
  string S;
  cin >> S;
  vector<string> B(8);
  for (int i = 0; i < 8; i++){
    cin >> B[i];
  }
  int cnt = 0;
  for (int i = 0; i < 8; i++){
    for (int j = 0; j < 8; j++){
      if (B[i][j] != '.'){
        cnt++;
      }
    }
  }
  if (cnt % 2 == 0){
    cout << S << endl;
  } else {
    if (S == "oda"){
      cout << "yukiko" << endl;
    } else {
      cout << "oda" << endl;
    }
  }
}