#include<fstream>
#include<cctype>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int cuvinte=0,lungime=0;
char caracter;
bool ok;

int main()
{
    f.get(caracter);
    ok=false;
    while (!f.fail())
    {
        if (isalpha(caracter)) {ok=true;lungime++;}
        else if (ok) {cuvinte++;ok=false;}
        f.get(caracter);
    }
    g<<lungime/cuvinte;
    f.close();g.close();
    return 0;
}