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

class Main88 {
	
	public static void out (Object o) {
		System.out.println(o);
	}
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		String name = br.readLine();
		int cnt = 0;
		
		for (int i = 0; i < 8; i++) {
			String line = br.readLine();
			for (int j = 0; j < 8; j++) {
				cnt = line.charAt(j) != '.' ? cnt + 1 : cnt;
			}
		}
		
		out(cnt % 2 == 0 ? name : name.equals("oda") ? "yukiko" : "oda");
		
	}
}