#include<cstdio>

int main()
{
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	char c;
	long long lg=0,nrc=0;
	bool cuvant=true;
	while(scanf("%c", &c)!=EOF)
	{
		int x=(int)c;
		if ((x>=65 && x<=90) || (x>=97 && x<=122))
		{
			lg++;
			if (cuvant)
			{
				nrc++;
				cuvant=false;
			}
		}
		else
			cuvant=true;
	}
	printf("%lld",lg/nrc);
	return 0;
}