#include <fstream>
#include <cstring>
using namespace std;
char x;
long long nrCuv, nrL;
bool ok = 0;
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    nrCuv = nrL = 0;
    while (!f.eof())
    {
        x = f.get();
        if (isalpha(x))
        {
            nrL++;
            ok = 1;
        }
        if (!isalpha(x))
        {
            if (ok == 1) nrCuv++;
            ok = 0;
        }
    }
    g << nrL / nrCuv;
    return 0;
}