#include <iostream>
#include <fstream>

using namespace std;

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

char c;

int main()
{
    in>>noskipws;
    in>>c;
    long i=0;
    bool cuvant=false;
    long lungimetotala=0;
    int nrc=0;

    while(!in.eof()){
        if((c>='a' && c<='z')||(c>='A' && c<='Z')){
            cuvant=true;
            lungimetotala++;
        }
        else{
            if(cuvant)
            nrc++;
            cuvant=false;
        }
        in>>c;
    }

    out<<lungimetotala/nrc;

    return 0;
}