#include<iostream>
#include<string>

using namespace std;

int main(){

	string s;
	cin>>s;

	string ban;
	int c=0;

	for(int i=0;i<8;i++){
		cin>>ban;
		for(int j=0;j<8;j++){
			if(ban[j]=='.') c++;
		}
	}

	if((c-4)%2==0) cout<<s<<endl;
	else if(s=="oda") cout<<"yukiko"<<endl;
	else cout<<"oda"<<endl;
}