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

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

    int N; cin >> N;
    vector<vector<int>> Graph(N);
    for(int i=0; i<N; i++){
        for(int k=0; k<4; k++){
            string s; cin >> s;
            if(s == "H") continue;
            int u = stoi(s)-1;
            Graph.at(u).push_back(i);
            
        }
    }

    auto dfs = [&](auto dfs,int pos,int back) -> void {
        for(auto to : Graph.at(pos)){
            if(to == back) continue;
            cout << "(";
            dfs(dfs,to,pos);
            cout << ")";
        }
        if(back == -1) cout << "methane\n";
        else cout << "methyl";
    };
    dfs(dfs,0,-1);

}