#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n) - 1; i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r) - 1;i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int n; cin >> n;
	vector to(n, vector<int>());
	rep(i, n) {
		rep(j, 4) {
			string s; cin >> s;
			if ("H" == s)continue;
			int n = stoi(s) - 1;
			to[i].push_back(n);
		}
	}
	string s;
	string m = "methyl";
	int use = 0;
	auto dfs = [&](auto &&self, int v, int p = -1, int d = 0)->void {
		if (-1 != p)s += '(';
		for (auto nv : to[v]) {
			if (p == nv)continue;
			self(self, nv, v, d + 1);
		}
		if (-1 != p)s += ')';
	};
	dfs(dfs, 0);
	string ans;
	rep(i, s.size()) {
		if (')' == s[i])ans += m;
		ans += s[i];
	}
	ans += "methane";
	cout << ans << endl;
	return 0;
}