/*Simple crypt for my mail
 *Compile with gcc. 
 */


#include <stdio.h>
#include <string.h>

void main()
{
int i,c;

   while ((c=getchar()) != EOF) 
    {
         if (65<=c&&c<=90) c--;
         if (91<=c&&c<=122) c++;
    putchar(c);
  }
 ;
}