#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _4aNWZeC ios::sync_with_stdio(0),cin.tie(0)
using ll=long long;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}

void slv(){
	vec(string) a={
		"watermelon",
		"beachball",
		"shrinebell"
	};
	int n=2;
	map<string,int> mp;
	rep(i,n){
		string s;
		cin>>s;
		mp[s]=1;
	}
	for(auto s:a){
		if(mp[s]==0){
			cout<<s<<"\n";
			return;
		}
	}
}

signed main(){
_4aNWZeC;
	slv();
}