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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<array<string, 4>> g(n);
    for(auto &&ary : g){
        for(auto &&ss : ary) cin >> ss;
    }
    auto dfs = [&](auto dfs, int v, int p) -> void {
        for(auto &&us : g[v]){
            if (us[0] == 'H') continue;
            int u = stoi(us) - 1;
            if (u == p) continue;
            cout << '(';
            dfs(dfs, u, v);
            cout << ')';
        }
        cout << (v ? "methyl" : "methane\n");
    };
    dfs(dfs, 0, -1);
}