#include <algorithm>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
using namespace std;
typedef pair<int, int> pii;
typedef vector<int> vi;
#define rep(i,x) for(int i=0;i<(int)(x);i++)

int main(){
	int cnt = 0;
	string p, l;
	cin >> p;
	rep(i,8) {
		cin >> l;
		rep(j,8) if (l[j]!='.') ++cnt;
	}
	if ((cnt-4)%2) {
		if (p=="oda") cout << "yukiko" << endl;
		else cout << "oda" << endl;
	} else {
		if (p=="oda") cout << "oda" << endl;
		else cout << "yukiko" << endl;
	}
	return 0;
}