#include<fstream>
using namespace std;

int x,alp,word;
char c;

int main(){
    ifstream in("text.in");
    while(in.get(c)){
        if (isalpha(c))
        {
            alp=1;
            x++;
        }
        else{
            if (alp==1)
            {
                alp=0;
                word++;
            }
        }
    }
    if (alp==1)
        word++;
    ofstream out("text.out");
    out<<x/word;
    in.close();
    out.close();
    return 0;
}