#include<cstdio>
#include <iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

using namespace std;
typedef long long ll;
typedef pair<int, int> Pr;

string s;
char board[10][10];
int sum;

int main()
{
	cin >> s;
	for (int i = 0; i < 8; i++) {
		for (int j = 0; j < 8; j++) {
			char c; 
			cin >> c;
			if (c == 'b')sum++;
			else if(c == 'w')sum++;
		}
	}
	if (sum % 2 == 0)cout << s << endl;
	else {
		if (s == "yukiko") cout << "oda" << endl;
		else cout << "yukiko" << endl;
	}
	
return 0;
}