#include<stdio.h>
#include<string.h>
#include<ctype.h>

int main()
{
	char ch;

	long len=0,cuv=0,k=0;

	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);

	while(scanf("%c", &ch)!=EOF)
	{
		if (isalpha(ch)!=0)
		{
			len=len+1;
		    if (k==0)
			   cuv=cuv+1;
		    k=1;
		}
		else
			k=0;
	}

	printf("%d\n",len/cuv);
	return 0;
}