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

namespace buyukkucuk
{
class Program
{
public static string cevir(string m,int uz)
{
string al, al2,s="";
al = m.ToLower();
al2 = m.ToUpper();
for (int i = 0; i < uz; i++)
{
if (m[i] == al[i]) s=s+ al2[i];
else if (m[i] == al2[i]) s =s+ al[i];
}
return s;
}
static void Main(string[] args)
{
string ad;
int uz;
Console.Write("İsim Giriniz :");
ad = Console.ReadLine();
uz = ad.Length;
Console.Write(cevir(ad,uz));
Console.ReadLine();
}
}
}