#include <bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)

string ban[2] = {"oda", "yukiko"};

int main() {
  
  string s; cin >> s;
  int cnt = 0;
  if(s == "yukiko") cnt ++;
  rep(i, 8) rep(j, 8) {
    char ch; cin >> ch;
    if(ch != '.') cnt ++;
  }
  
  if((64-cnt) % 2 == 0) cout << ban[0] << endl;
  else cout << ban[1] << endl;
  
  return 0;
}