#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <algorithm>
#include <functional>
#include <limits>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <complex>

using namespace std;

#define INF (INT_MAX/3)
#define PI (2*acos(0.0))
#define EPS (1e-8)

typedef long long ll;
typedef unsigned long long ull;

int main(){
  ios_base::sync_with_stdio(0);
  string S[2] = {"oda", "yukiko"}, B, s;
  int now_p, cnt = 0;
  cin >> s;
  
  if(s == "oda") now_p = 0;
  else now_p = 1;

  for(int i = 0; i < 8; i++){
    cin >> B;
    for(int i = 0; i < 8; i++) if(B[i] != '.') cnt++;
  }
  cnt -= 4;
  
  if(cnt & 1) cout << S[(now_p + 1)%2] << endl;
  else cout << S[now_p] << endl;
  return 0;
}