#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    int litere=0,cuvant=1,spatii=0;
    char x;
    fin.get(x);
    while (fin.get(x))
    {
        if (x>='a'&&x<='z' || x>='A'&& x<='Z') {cuvant=1; litere++;}
        if ((x==' ')&&(cuvant==1)) {spatii++; cuvant=0;}
    }
    fout<<litere/(spatii+1);
    return 0;
}