#include<fstream>
using namespace std;
ifstream f1("text.in");
ofstream f2("text.out");
int main()
{
	char c;
	int cuv=0,len=0;
	int k=0;
	while (f1.get(c))
		if ((c>=65 && c<=90) || (c>=97 && c<=122)) 
                       {len++; 
                        if (k==0) cuv++; 
                        k=1;}
                   else k=0;}
	        
	f2<<len/cuv;		
	f1.close();
	f2.close();
	return 0;
}