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

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}

void dfs(int u, int pre, vector<vector<int>> &g, string &ans) {
	for (int v : g[u]) {
		if (v == pre) {
			continue;
		}
		ans += "(";
		dfs(v, u, g, ans);
		for (int i = 0; i < 3; i++) {
			ans.pop_back();
		}
		ans += "yl)";
	}
	ans += "methane";
}
int main() {
	fast_io();
	int n;
	cin >> n;
	vector<vector<int>> g(n);
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < 4; j++) {
			string s;
			cin >> s;
			if (s == "H") {
				continue;
			}
			g[i].push_back(stoi(s) - 1);
		}
	}
	string ans = "";
	dfs(0, -1, g, ans);
	cout << ans << endl;
}