using System using System Collections Generic using System Linq using

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static char[] CreateTree(unt n)
        {
            int m1 = 1, m2 = 1, level = 1, m, k;
            char[] z = new char[33000];
            z[1] = 'a';
            while (level < n)
            {
                for (k = m1; k <= m2; k++)
                {
                    m = 2 * k;
                    switch (z[k])
                    {
                        case 'a':
                            {
                                z[m] = 'b';
                                z[m + 1] = 'c';
                                break;
                            }
                        case 'b':
                            {
                                z[m] = 'c';
                                z[m + 1] = 'a';
                                break;
                            }
                        case 'c':
                            {
                                z[m] = 'a';
                                z[m + 1] = 'b';
                                break;
                            }
                    }
                }
                level++;
                m1 *= 2;
                m2 = m2 * 2 + 1;
            }
            return z;
        }

        static void Main(string[] args)
        {

        }
    }
}