#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
}
set<string> st = {"watermelon", "beachball", "shrinebell"};

int main() {
    fast_io();
    string s, t;
    cin >> s >> t;
    st.erase(s);
    st.erase(t);
    cout << *st.begin() << endl;
}