using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleAppForGit
{
    internal class Strings
    {
        public string? str = Console.ReadLine();

        void FirstTask(string str)
        {
            string strFinish = "";
            int len = str.Length;
            int i = 0;
            while (i < len)
            {
                if (i % 2 == 0)
                {
                    strFinish = strFinish + str[i];
                }
            }
            Console.WriteLine(strFinish);
        }
        void NinethTask(string str)
        {
            string strFinish = "";
            string strEvenFinish = "";
            int len = str.Length;
            int i = 0;
            while (i < len)
            {
                if (i % 2 == 0)
                {
                    strFinish = strFinish + str[i];
                }
            }
            while (i < len)
            {
                if (i % 2 != 0)
                {
                    strEvenFinish = strEvenFinish + str[i];
                }
            }
            Console.WriteLine(strFinish);
            Console.WriteLine(strEvenFinish);
        }
    }
}