#include <ctype.h>
#include <stdio.h>

int main(void) {
	char c = 0;
	while (c!='a') {
		c = getchar();
		if (isalpha(c)) printf ("\n%c is a char\n", c);
		if (isdigit(c)) printf ("\n%c is a digit\n", c);
	}
	return 0;
}