#include<string.h>
#include<stdio.h>
#include<string.h>
#define NM 1048576

int main()
{
FILE *f;
f=fopen("text.in","r");
freopen("text.out","w",stdout);
int i,cuv=0,car=0,l;
char s,c=' ';
while(fscanf(f,"%c",&s)!=EOF)
	{
	if(s>='a'&&s<='z'||s>='A'&&s<='Z')
	  {
		car++;
		if(!(c>='a'&&c<='z'||c>='A'&&c<='Z'))cuv++;
		}
	c=s;
	}
if(car==0) printf("0");
else
printf("%d",car/cuv);
return 0;
}