import java.util.Scanner;
import java.util.stream.IntStream;

public class Main{
	static IntStream REPS(int v){return IntStream.range(0,v);}
	static IntStream REPS(int l,int r){return IntStream.rangeClosed(l,r);}
	static IntStream INS(int n){return REPS(n).map(i->getInt());}
	static Scanner s=new Scanner(System.in);
	static int getInt(){return Integer.parseInt(s.next());}
	static long getLong(){return Long.parseLong(s.next());}

	public static void main(String[]$){
		String f=s.next();
		System.out.println(
				REPS(8).flatMap(i->s.next().chars())
				.filter(i->i!='.')
				.count()
				%2==1^f.equals("oda")?"oda":"yukiko"
				);
	}
}