#include<fstream.h>
#include<iomanip.h>
#include<iostream.h>

int main()
{	ifstream f("text.in",ios::in);
	ofstream g("text.out");
	int k_cuv=0,k_lit=0;
	char c,aux='0';
	while(!f.eof())
	{	f>>resetiosflags(ios::skipws)>>c;
		if((((((((((((((((((((((((c!='-'&&c!='!')&&c!='?')&&c!='.')&&c!=',')&&c!=';')&&c!=':')&&c!='[')&&c!=']')&&c!='/')&&c!='^')&&c!='<')&&c!='>')&&c!='}')&&c!='{')&&c!='~')&&c!='+')&&c!='*')&&c!='&')&&c!='@')&&c!='#')&&c!='%')&&c!='(')&&c!=')')&&c!='|')
		{       if(c=='\n') k_cuv++;
			else	if(c==' ') k_cuv++;
				else	if(aux=='-') {k_cuv++;k_lit++;}
					else k_lit++;
		}
		if(c=='-') aux=c;
		else aux='0';
	}
	g<<k_lit/k_cuv;
	f.close();
	g.close();
}