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

char ch;
int nrcuv,nr;
bool cuv;
int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	while(scanf("%c",&ch)!=EOF)
	{
		if( (ch>='a' && ch<='z') || (ch>='A' && ch<='Z') )
		{
			nr++;
			cuv = true;
		}	
		else 
			if( cuv == true )
			{
				nrcuv++;
				cuv = false;
			}	
	}	
	printf("%d\n",nr/nrcuv);
	return 0;
}