#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
typedef long long ll;

int main()
{
  string s1;
  cin >> s1;
  string s2 = s1 == "oda" ? "yukiko" : "oda";
  int cnt = 0;
  FOR(i,0,8) {
    string in;
    cin >> in;
    FOR(j,0,8) {
      if(in[j]!='.') cnt++;
    }
  }
  cout << (cnt % 2 == 0 ? s1 : s2) << endl;
  return 0;
}