#include <stdio.h>

#define SIZE	80

int main() {
	char v[SIZE], c;
	int as, i, lon = 0;

	printf("Intro seq de chars: ");
	/*
	// Va pero es un lio
	do {
		scanf("%c", &v[lon]);
		lon++;
	} while (v[lon-1] != '\n');
	*/
	i = 0;
	do {
		scanf("%c", &c);
		v[i] = c;
		i++;
	} while (c != '\n');
	lon = i - 1;
	for(i=0, as=0; i < lon; i++) {
		if (v[i] == 'a') {
			as++;
		}
	}
	printf("Num as = %d\n", as);
}