/*
Kim Uncode

Simple cypher. Each letter replaced by one letter after it. 'z' rotates to 'a'

*/
#include<stdio.h>

int main(void)
{
  char c;
  c = getchar();

  while (c != EOF) {
    if ((c >= 'a') && (c <= 'y')) {
      c++;
      putchar(c);
    } else if ((c >= 'A') && (c <= 'Y')) {
      c++;
      putchar(c);
    } else if (c == 'z') {
      putchar('a');
    } else if (c == 'Z') {
      putchar('A'); 
    } else {
      putchar(c);
    }

    //get next char
    c = getchar();
  }
  return(0);
}