#include <cstdio>
#include <cstdlib>
#include <cstring>

long long int o, s;
int i;
bool irasjel = true;

int main()
{
	FILE *f = freopen("text.in", "r", stdin);
	freopen("text.out", "r", stdin);
	char c;
	char ca[100];

	while (!feof(f))
	{
		scanf("%c", &c);
		if ((c>='a' && c<='z')||(c>='A' && c<='Z'))
		{
			++o;
			if (irasjel)
			{
				++s;
				irasjel = false;
			}
		}
		else irasjel = true;
	}

	printf("%d", o/s);

	return 0;
}