/*  Example: Encrypting machine
	Author: Peter Brusilovsky
 */

#include <stdio.h>
#define SHIFT 1
#define NLCHARS ('z'-'a'+1) /* 26 */
#define NUCHARS ('Z'-'A'+1) /* 26 */

void main () {
	int ch, charnum;

	while((ch = getchar()) != EOF) 
		if(ch >= 'a' && ch <= 'z') {
			charnum = ch - 'a'; /* a => 0, b => 1... z => 25  */
			putchar('a' + (charnum + SHIFT) % NLCHARS);
		} else if (ch >= 'A' && ch <= 'Z') {
			charnum = ch - 'A'; /* A => 0, B => 1... Z => 25 */
			putchar('A' + (charnum + SHIFT) % NUCHARS);
		} else
			putchar(ch);	
}