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