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

int main() {
	FILE *f1 = fopen("text.in", "r");
	FILE *f2 = fopen("text.out", "w");

	long nr_cuv = 0;
	long lung_t = 0;

	char c;
	int z = 0;
	while((c = fgetc(f1)) != -1) {
		if(isalpha(c) == 0) {
			if(z == 1) {
				z = 0;
				nr_cuv++;
			}
		}
		else {
			z = 1;
			lung_t++;
		}
	}

	fprintf(f2, "%ld\n", lung_t/nr_cuv);

	fclose(f1);
	fclose(f2);
	return 0;
}