#include<fstream>
using namespace std;
char c;
long nrlit=0;
int nrcuv=0,ok=0;
int main()
{
	ifstream in("text.in");
	ofstream out("text.out");
	in.get(c);
	while(!isalpha(c))
		in.get(c);
	nrlit++;
	while(in.good())
	{	
		in.get(c);
		if(isalpha(c))
		{
			nrlit++;
			ok=1;
		}
		else
			if(ok==1)
			{
				nrcuv++;
				ok=0;
			}
	}
	out<<nrlit/nrcuv;
	in.close();
	out.close();
	return 0;
}