#include <fstream>
#include <cstring>
#include <cctype>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int main()
{
    unsigned long nrCuv = 0, nrCar = 0;
    char prevChar, currentChar;
    f.get(prevChar);
    if(isalpha(prevChar)) {
        nrCuv++;
        nrCar++;
    }
    while(!f.eof()) {
        f.get(currentChar);
        if(isalpha(currentChar)){
            nrCar++;
            if(!isalpha(prevChar))
                nrCuv++;
        }
        prevChar = currentChar;
    }
    g<<nrCar/nrCuv<<'\n';
    f.close();
    g.close();

    return 0;
}