#include<iostream>
#include<string.h>
using namespace std;

char str[10];
int syoki, cnt;

int main(){
	cin >> str;
	if( strcmp( str, "oda" ) == 0 )
		syoki = 0;
	else
		syoki = 1;
	
	for( int i = 0; i < 8; i++ ){
		cin >> str;
		for( int j = 0; j < 8; j++ ){
			if( str[j] != '.' ){
				cnt++;
			}
		}
	}
	int ans = syoki + cnt;
	ans %= 2;
	
	if( ans == 0 ){
		cout << "oda" << endl;
	}
	else{
		cout << "yukiko" << endl;
	}
	return 0;
}