#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
using namespace std;
typedef long long LL;
typedef vector<int> VI;

int main() {
	string s;
	char b;
	cin >> s;
	string ns;
	if (s == "oda") ns = "yukiko";
	else ns = "oda";
	int cnt = 0;
	REP(i, 64) {
		cin >> b;
		if (b != '.') cnt++;
	}
	cout << ((cnt % 2 == 0) ? s : ns) << endl;
	return 0;
}