#include<cstdio>
#include<string.h>
using namespace std;
FILE *f=fopen("text.in","r");
FILE *g=fopen("text.out","w");
int i,nr,dim,OK;
char c;
int main ()
{
	while(fscanf(f,"%c",&c)!=EOF)
	{
		if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
		{
			OK=1;
			dim++;
		}
		else
			if(OK)
			{
				nr++;
				OK=0;
			}
	}
	fprintf(g,"%d",dim/nr);
	return 0;
}