#include<stdio.h>

int main(){
	unsigned char zee = 'z';
	printf("%c, %d\n", zee, zee);
	zee += 26;
	printf("%c, %d\n", zee, zee);
	if(zee > 'z')
		zee -= 26;
	printf("%c, %d\n", zee, zee);
	// The compiler won't even warn us about this mistake!
	zee = -5;
	printf("%c, %d\n", zee, zee);
	return 0;
}