#include <iostream>
#include <string>
using namespace std;
int main(int argc, char* argv[])
{
	string S;
	cin>>S;
	int num=0;
	for (int i=0;i<8;i++){
		string T;
		cin>>T;
		for (int j=0;j<T.size();j++){
			if (T[j]!='.'){
				num++;
			}
		}
	}
	if (num%2==0){
		cout<<S<<endl;
	}else{
		if (!S.compare("oda")){
			cout<<"yukiko"<<endl;
		}else{
			cout<<"oda"<<endl;
		}
	}
	return 0;
}