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


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

	int nrw = 0, nrc = 0, ok = 0;
	char c;

	while(!feof(stdin))
	{
		scanf("%c", &c);
		if(isalpha(c))
		{
			++nrc;
			ok = 1;
		}
		else
		{
			if(ok)
			{
				++nrw;
				ok = 0;
			}
		}
	}
	if(ok)
		++nrw;
//	printf("%d %d\n", nrc, nrw);
	printf("%d\n", nrc / nrw);


	return 0;
}