#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<(int)(n);i++)

int main(){
	string s,t;
	cin>>s>>t;
	set<string> st={"watermelon","beachball","shrinebell"};
	st.erase(s);
	st.erase(t);
	cout<<*st.begin()<<endl;
}