import java.util.Scanner;

public class WhichIsNext{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String S = sc.nextLine();
        for(int i = 0; i < 8; i++){

            String[] row = sc.nextLine().split("");
            for(int j = 0; j < 8; j++){
                if(!row[j].equals(".")){
                    if(S.equals("oda")) S = "yukiko";
                    else S = "oda";
                }
            }
        }
        System.out.println(S);
    }
}