#include <iostream>
#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int i,j,l,lm;
char c;
int main()
{
    while(f>>noskipws>>c){if(c>'A'&&c<='z')lm++;
                           else if(c==' '&&lm>0)l++;
                            else if(c=='-'&&lm>0)l++; }l++;
    g<<lm/l;


    f.close();
    g.close();

    return 0;
}