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