5. heti házi

namespace PMPHF004_P99J7Y
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string E = Console.ReadLine();
            char[] chararray = E.ToCharArray();

            #region 1. lépés
            if (E.Length > 1)
            {
                string elsolep = "";
                for (int i = 1; i < chararray.Length; i += 2)
                {
                    elsolep += chararray[i];
                }

                int hossz = elsolep.Length - 1;
                string megfordit = "";
                while (hossz >= 0)
                {
                    megfordit += elsolep[hossz];
                    hossz--;
                }
                char[] elsoarray = megfordit.ToCharArray();
                int n1 = 0;
                for (int i = 0; i < chararray.Length; ++i)
                {
                    if (i % 2 == 1)
                    {
                        chararray[i] = elsoarray[n1];
                        n1++;
                    }
                }
            }
            #endregion 1. lépés

            #region 2. lépés
            if (E.Length > 2)
            {
                string masodik = "";
                for (int i = 2; i < chararray.Length; i += 3)
                {
                    masodik += chararray[i];
                }

                char firstchar = masodik[0];
                for (int i = 5; i < chararray.Length; i += 3)
                {
                    chararray[i - 3] = chararray[i];
                }

                int index = chararray.Length;
                if (chararray.Length % 3 == 0)
                {
                    index = chararray.Length - 1;
                }
                else if (chararray.Length % 3 == 2)
                {
                    index = chararray.Length - 3;
                }
                else
                {
                    index = chararray.Length - 2;
                }
                chararray[index] = firstchar;
            }
            #endregion 2. lépés

            #region 3. lépés
            if (E.Length > 3)
            {
                string harmadik = "";
                for (int i = 3; i < chararray.Length; i += 4)
                {
                    harmadik += chararray[i];
                }

                chararray[3] = harmadik[harmadik.Length - 1];
                int k = 0;
                for (int i = 7; i < chararray.Length; i += 4)
                {
                    chararray[i] = harmadik[k];
                    k++;
                }
            }
            #endregion 3. lépés

            Console.Clear();

            #region 4. lépés
            string szo = new string(chararray);
            string[] szavak = szo.Split(' ');
            int[] count = new int[szavak.Length];
            for (int i = 0; i < szavak.Length; i++)
            {
                count[i] = szavak[i].Length;
            }

            int length = count.Length-1;
            string reverse = "";
            while (length >= 0)
            {
                reverse += count[length]+" ";
                length--;
            }
            for (int i = 0; i < count.Length; i++)
            {
                count[i] = int.Parse(reverse.Split(" ")[i]);
            }

            if (chararray.Length > 1)
            {
                string megoldas = "";
                for (int i = 0; i < szavak.Length; i++)
                {
                    megoldas += szavak[i];
                }
                int f = 0;
                for (int i = 0; i < szavak.Length; i++)
                {
                    megoldas = megoldas.Insert(count[i] + f, " ");
                    f += count[i]+1;
                }
                Console.Write(megoldas.Remove(megoldas.Length - 1));
            }
            else
            {
                Console.Write(chararray);
            }
            #endregion 4. lépés
        }
    }
}