#include <iostream>
#include <cstdio>
#include <cstring>
#define MAXN 2000050

using namespace std;

char s[MAXN];
int len, cuv;

int main()
{
    freopen("text.in", "r", stdin);
    freopen("text.out", "w", stdout);

	fread(s, 1, MAXN, stdin);
	int c = 0;
	for (int i = 0; s[i]; i++)
	{
		if (s[i] >= 'a' && s[i] <= 'z' || s[i] >= 'A' && s[i] <= 'Z')
			len++, c = 1;
		else {
			cuv += c;
			c = 0;
		}
	}
	cuv += c;

    printf("%d", len / cuv);


    return 0;
}