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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
  string S, T;
  cin >> S >> T;
  vector<string> u = {"watermelon", "beachball", "shrinebell"};
  vector<int> v(3, 0);
  rep(i, 3) {
    if (S == u[i])
      v[i] = 1;
    if (T == u[i])
      v[i] = 1;
  }
  rep(i, 3)
    if (v[i] == 0)
      cout << u[i] << endl;
  return 0;
}