#include <bits/stdc++.h>
// #include <x86intrin.h>
using namespace std;
#if __cplusplus >= 202002L
using namespace numbers;
#endif



int main(){
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(ios::badbit | ios::failbit);
	set<string> mp{"watermelon", "beachball", "shrinebell"};
	for(auto i = 0; i < 2; ++ i){
		string s;
		cin >> s;
		mp.erase(s);
	}
	cout << *mp.begin() << "\n";
	return 0;
}

/*

*/