#include <fstream>

using namespace std;

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

    int nrCaract = 0, nrCuv = 0;
    bool cuvBun = false;
    char caracter;

    while( !fin.eof() )
    {
        fin.get(caracter);
        if( ( (caracter >= 'A') && (caracter <= 'Z') ) || ( (caracter >= 'a') && (caracter <= 'z') ) )
        {
            nrCaract++;
            cuvBun = true;
        }
        else
        {
            if( cuvBun )
            {
                nrCuv++;
                cuvBun = false;
            }
        }
    }

    fout << nrCaract/nrCuv;

    return 0;
}