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

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String name1 = br.readLine();
        String name2;
        if (name1.equals("oda")) {
            name2 = "yukiko";
        } else {
            name2 = "oda";
        }
        int count = 0;
        for (int i = 0; i < 8; i++) {
            char[] arr = br.readLine().toCharArray();
            for (char c : arr) {
                if (c != '.') {
                    count++;
                }
            }
        }
        if (count % 2 == 0) {
            System.out.println(name1);
        } else {
            System.out.println(name2);
        }
    }
}