import java.util.*;
import java.math.*;
import java.io.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		char[] in;
		int count = 0;
		for(int i = 0; i < 8; i++) {
			in = sc.next().toCharArray();
			for(int j = 0; j < 8; j++) {
				if(in[j] != '.') count++;
			}
		}
		if(count % 2 == 0) {
			System.out.println(S);
		}
		else {
			if(S.equals("oda")) System.out.println("yukiko");
			else System.out.println("oda");
		}
	}
}