#include <bits/stdc++.h>

using namespace std;

void Solve() {
  int n;
  cin >> n;
  vector<vector<int>> g(n);
  for (int i = 0; i < n; ++i) {
    for (int _ = 4; _--;) {
      cin >> ws;
      if (cin.peek() == 'H') {
        cin.ignore();
      } else {
        int j;
        cin >> j;
        --j;
        g[i].push_back(j);
      }
    }
  }

  auto Dfs = [&](auto Dfs, int i, int p) -> void {
    for (int j : g[i]) {
      if (j == p) {
        continue;
      }
      cout << '(';
      Dfs(Dfs, j, i);
      cout << ')';
    }
    cout << (p == -1 ? "methane" : "methyl");
  };
  Dfs(Dfs, 0, -1);
  cout << '\n';
}

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

  Solve();
}