import java.util.HashMap;
import java.util.Scanner;

public class Main1 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        HashMap<String,Boolean>map=new HashMap<>();
        String []ar={"watermelon","beachball","shrinebell"};
        map.put(ar[0], false);
        map.put(ar[1], false);
        map.put(ar[2], false);
        for (int i = 0; i < 2; i++) {
            String tem=sc.next();
            map.put(tem, true);
        }
        sc.close();
        for (String s : map.keySet()) {
            if(map.get(s)==false){
                System.out.println(s);
            }
        }
    }
}