#include "bits/stdc++.h"
using namespace std;
using Graph = vector<vector<int>>;
typedef long long ll;
typedef pair<ll, ll> P;
#define rep(i,n) for (ll i = 0; i < (n); ++i)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const long long mod = 1e9 + 7;

ll gcd(ll a, ll b) {
	return b ? gcd(b, a % b) : a;
}

ll lcm(ll a, ll b) {
	return a / gcd(a, b) * b;
}

int main() {
	string s;
	cin >> s;

	vector<string> board(8);

	rep(i, 8) {
		cin >> board[i];
	}
	
	ll cnt=0;

	rep(i, 8) {
		rep(j, 8) {
			if(board[i][j]=='.')cnt++;
		}
	}
	if (s == "oda") {
		if (cnt % 2 == 0) {
			cout << "oda" << endl;
		} else {
			cout << "yukiko" << endl;
		}
	} else {
		if (cnt % 2 == 0) {
			cout << "yukiko" << endl;
		} else {
			cout << "oda" << endl;
		}
	}
	
}