#include<stdio.h>
inline bool pac(char c)
{
	return(c>='a' && c<='z' || c>='A' && c<='Z') ;
}
int main()
{
	char n;
	int lit=0,cuv=0;
	int s=0;
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	while(scanf("%c",&n)!=EOF)
	{	
		if(pac(n)==true)
		{
			lit++;
			if(s==0)
				cuv++;
			s=1;
		}
		else
			s=0;
	}
	printf("%d",lit/cuv);
}