#include<iostream>
#include<string>
#include<set>
#include<cassert>
using namespace std;

int main() {
  string s,t;
  cin>>s>>t;
  set<string> ss={"watermelon","shrinebell","beachball"};
  ss.erase(s);
  ss.erase(t);
  assert(ss.size()==1);
  cout<<*ss.begin();
  return 0;
}