using System;
using System.Text;
public class Program
{
public static void Main()
StringBuilder b= new StringBuilder(Console.ReadLine());
string a;
int c=1;
a=Console.ReadLine();
a=b.ToString();
for(int i=0;i<b.Length;i++)
if(c==1)
b[i]=Convert.ToChar(b[i].ToString().ToUpper());
c=0;
}
else
b[i]=Convert.ToChar(b[i].ToString().ToLower());
c=1;
Console.WriteLine("{0}",b);