/* -*- coding: utf-8 -*-
 *
 * 2599.cc:  No.2599 Summer Project - yukicoder
 */

#include<cstdio>
#include<cstring>
#include<algorithm>
 
using namespace std;

/* constant */

const int N = 3;
const int MAX_L = 16;
const char ss[N][MAX_L] = { "watermelon", "beachball", "shrinebell" };

/* typedef */

/* global variables */

char s[MAX_L], t[MAX_L];
int cs[N];

/* subroutines */

/* main */

int main() {
  scanf("%s%s", s, t);

  for (int i = 0; i < N; i++)
    if (! strcmp(s, ss[i]) || ! strcmp(t, ss[i])) cs[i]++;

  for (int i = 0; i < N; i++)
    if (! cs[i]) puts(ss[i]);

  return 0;
}