using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var tree = new List<int>[n];
        for (var i = 0; i < n; ++i) tree[i] = new List<int>();
        for (var i = 0; i < n; ++i)
        {
            var s = ReadLine().Split();
            for (var j = 0; j < s.Length; ++j) if (s[j] != "H")
            {
                tree[i].Add(int.Parse(s[j]) - 1);
            }
        }
        var sb = new System.Text.StringBuilder();
        DFS(0, -1, tree, sb);
        WriteLine(sb.ToString());
    }
    static void DFS(int cur, int prev, List<int>[] tree, System.Text.StringBuilder sb)
    {
        if (cur != 0) sb.Append("(");
        foreach (var next in tree[cur])
        {
            if (prev == next) continue;
            DFS(next, cur, tree, sb);
        }
        if (cur == 0) sb.Append("methane");
        else sb.Append("methyl)");
    }
}