#include <stdio.h>
#define DIM 1 << 20 + 5

char T[DIM];
long long L, CUV;

int ch (int C) {
	return (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z');
}

int main () {
	
	int i;
	freopen ("text.in", "r", stdin);
	freopen ("text.out", "w", stdout);
	
	fgets (T, DIM, stdin);
	
	for (i = 0; T[i]; ++i)
		if (ch (T[i])) {
			++L;
			if (!ch (T[i - 1])) ++CUV;			
		}

	printf ("%lld", L / CUV);
	
	return 0;
}