#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<ll> vll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<vector<ll>> vvll;
const ll inf = 1e16;
const ll md = 1000000007;

int main() {
  string s;
  cin>>s;
  bool oda=(s=="oda");
  int cnt=0;
  rep(i,8){
    string b;
    cin>>b;
    for(char c:b) if(c!='.') cnt++;
  }
  bool first=(cnt%2==0);
  if(oda^first) puts("yukiko");
  else puts("oda");
  return 0;
}