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

int main()
{
	FILE *f = fopen("text.in", "rt");
	FILE *g = fopen("text.out", "wt");
	char s[1000000];
	long i, cont = 0, k = 0, nrCaractere = 0;
	fgets(s, 1000000, f);

	for (i = 0; i < strlen(s); i++)
	{

		if ((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z'))
		{
			k = 1;
			nrCaractere++;
		}
		else
		{
			if (k)
			{
				k = 0;
				cont++;
			}
		}

	}

	if (cont)
	{
		cont = nrCaractere / cont;
	}
	
	fprintf(g, "%d", cont);
	fclose(f);
	fclose(g);
	return 0;
	


}