import java.util.*;
public class Main {
    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);

        
        String s = sc.next();
        String t = sc.next();

        Set<String> values = Set.of(s,t);

        if (!values.contains("watermelon")){
            System.out.println("watermelon");
        }else if (!values.contains("beachball")){
            System.out.println("beachball");
        }else{
            System.out.println("shrinebell");
        }

    }
}