#include <fstream>
#include <ctype>
using namespace std;

int main()
{
	ifstream f("text.in");
	ofstream g("text.out");
	
	char c,c2;
	unsigned int wordNr=0, textLength=0;
	
	while(!f.eof())
	{
		c2=c;
		f.get(c);
	 	if(isalpha(c))
	 		textLength++;
 		if((c==' ' || c=='-') && (c2!=' ' && c2!='-'))
 			wordNr++;
	}
	
	g<<(int)textLength/wordNr;
}