#include<stdio.h>


int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	
int len=0,cuv=0,k=0;
char c;

while(scanf("%c",&c)!=EOF)
{
	if((c>='a' && c<='z') || (c>='A' && c<='Z'))
     {
        len++;
      if(k==0) cuv++;
     k=1;
     }	
else k=0;
}

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