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

int main() {
string b;
cin>>b;
string s[10];
for (int i = 0; i < 8; ++i) {
		cin>>s[i];
}
int c=0;
for (int i = 0; i < 8; ++i) {
	for (int j = 0; j < 8; ++j) {
		if(s[i][j]=='.'){
			c++;
		}
	}
}
if(c%2==0){
	cout<<b<<endl;
}else if(b=="oda"){
	cout<<"yukiko"<<endl;
}else{
	cout<<"oda"<<endl;
}


}