#include <bits/stdc++.h>
//#include <atcoder/all>
using ll = long long;
const int MOD = 1000000007;
const int Mod = 998244353;
const int MAX = 1000000005;
const long long INF = 1000000000000000005LL;
using namespace std;
//using namespace atcoder;

string dfs(int v, int p, vector<vector<int>>& G) {
    string ret;
    for (int& nv : G[v]) {
        if (nv == p) continue;
        string response = dfs(nv, v, G);
        for (int i = 0; i < 3; i++) response.pop_back();
        ret += "(";
        ret += response;
        ret += "yl)";
    }
    ret += "methane";
    return ret;
}

int main() {
    ios::sync_with_stdio(0); cin.tie();
    int N;
    cin >> N;
    vector<vector<int>> G(N);
    for (int i = 0; i < N; i++) {
        vector<string> L(4);
        for (int j = 0; j < 4; j++) cin >> L[j];
        for (int j = 0; j < 4; j++) {
            if (L[j] != "H") {
                int v = stoi(L[j]) - 1;
                G[i].push_back(v);
            }
        }
    }
    cout << dfs(0, -1, G) << endl;
}