#include <fstream>
#include <cstring>
using namespace std;

ifstream f("text.in");
ofstream g("text.out");

char text[256];
int nrCuv, nrLitere;

int main() {
    while(!f.eof()) {
        f.getline(text, 255);
        for(unsigned int i = 0; i < strlen(text); i++)
        if(isalpha(text[i])) {
            nrLitere++;
            if(!isalpha(text[i-1]) || i == 0)
                nrCuv++;

        }
    }

    g << nrLitere / nrCuv;

}