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

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        String fisrt = sc.next();
        
        int sum = 0;
        for (int i=0; i<8; i++) {
            char[] field = sc.next().toCharArray();
            for (int j=0; j<8; j++) {
                if(field[j] != '.'){
                    sum++;
                }
            }
        }

        if(sum % 2 == 0){
            System.out.println(fisrt.equals("oda") ? "oda" : "yukiko");
        }else{
            System.out.println(fisrt.equals("oda") ? "yukiko" : "oda");
        }
        
    }
}