#include <fstream>
using namespace std;

int lit, nrcuv;
char bef, c;

int main()
{
    ifstream f ("text.in");
    ofstream g ("text.out");
    while(f.get(c)) {
        if((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
            ++lit;
            if(!((bef >= 'a' && bef <= 'z') || (bef >= 'A' && bef <= 'Z')))
                ++nrcuv;
        }
        bef = c;
    }
    g << lit / nrcuv;
    return 0;
}