#include <bits/stdc++.h>
using namespace std;

long long mod = 998244353;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

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