#include <fstream>
#define inFile "text.in"
#define outFile "text.out"

using namespace std;

int main()
{
    char c;
    int nrC=0,nrL=0,nou=0;

    ifstream fin(inFile);
    while(!fin.eof())
    {
        fin.get(c);
        if(c>=65 && c<=90 || c>=97 && c<=122) {nrL++; nou++;}
        else{if(nou) nrC++; nou=0;}
    }
    fin.close();

    ofstream fout(outFile);
    fout<<nrL/nrC;
    fout.close();
}