#include <stdio.h>

char c;

int main(void) {
  c = 'Z';
  printf("%c\n",c);
  c = c - 1;
  printf("%c\n",c);
  c = c - 1;
  printf("%c\n",c);
  c = c + 1;
  printf("%c\n",c);
  c = c + 1;
  printf("%c\n",c);
}