#include <stdio.h>

inline bool litera(char c)
{
	return (((c>='A')&&(c<='Z'))||((c>='a')&&(c<='z')))?1:0;
}

int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	
	int cuv=0,l=0;
	char c,b='#';
	while(scanf("%c",&c)!=EOF)
	{
		if(!litera(c))
		{
			if(litera(b))
				cuv++;
		}
		else
			l++;
		b=c;
	}
	printf("%d",l/cuv);
	return 0;
}