import java.util.*;
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        String s = koko.next();
        String[] b = new String[8];
        int count =0;
        for(int i=0; i<8; i++){
            b[i]=koko.next();
            char[] ch = b[i].toCharArray();
            for(int j=0; j<8; j++){
                if(ch[j]=='.'){
                    
                }else{
                    count++;
                }
            }
        }
        if(count%2==0){
            System.out.println(s);
        }else{
            if(s.equals("oda")){
                System.out.println("yukiko");
            }else{
                System.out.println("oda");
            }
        }
    }
}