#include <bits/stdc++.h>
using namespace std;

int main()
{
	string S, B[8];
	cin >> S;
	for( int i = 0; i < 8; i++ ) {
		cin >> B[i];
	}

	int num = 8;
	for( int i = 0; i < 8; i++ ) {
		for( int j = 0; j < 8; j++ ) {
			if( B[i][j] != '.' ) num++;
		}
	}

	string ans = "oda";
	if( num % 2 ) {
		if( S == "oda" ) ans = "yukiko";
	}
	else {
		if( S == "yukiko" ) ans = "yukiko";
	}

	cout << ans << endl;
}