#include<cstdio>
using namespace std;
int main()
{
	char c;
	long long nrcuv=0,nrlit=0,sol;
	bool cuvant=false;
	freopen("text.in","r",stdin);
	scanf("%c",&c);
	if((c>64 && c<91) || (c>96 && c<123))
	{
		nrlit++;
		nrcuv++;
		cuvant=true;
	}
	while(c!='\n')
	{
		scanf("%c",&c);
		if((c>64 && c<91) || (c>96 && c<123))
		{
			nrlit++;
			if(cuvant==false)
			{
				nrcuv++;
				cuvant=true;
			}
		}
		else
			cuvant=false;
	}
	sol=nrlit;
	sol=sol/nrcuv;
	freopen("text.out","w",stdout);
	printf("%lld\n",sol);
	return 0;
}