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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    set<string> S{"watermelon","beachball","shrinebell"};
    string s, t;
    cin >> s >> t;
    S.erase(s);
    S.erase(t);
    cout << *S.begin() << '\n';
}