EVM9

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

namespace ConsoleApp1
{
    class Program
    {


        static void Main(string[] args)
        {
            StringBuilder a = new StringBuilder(Console.ReadLine());
            for(int i = 0; i < a.Length - 1; i+=2)
            {
                char x = a[i];
                a[i] = a[i + 1];
                a[i + 1] = x;
            }
            Console.WriteLine(a);

            string[] b = a.ToString().Split();

            for(int i = 0; i < b.Length; i++)
            {
                if (b[i].Length <= 5) Console.WriteLine(b[i]);
            }
        }
    }
}