#include <iostream>
#include <cstring>
#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char c;
int nrlit,nrcuv,rez;

int main()
{
    while(f>>noskipws>>c)
    {
        if((c>='a' && c<='z') || (c>='A' && c<='Z'))
        {
            nrcuv++;
            nrlit++;
            while((c>='a' && c<='z') || (c>='A' && c<='Z'))
            {
                f>>noskipws>>c;
                nrlit++;
            }
            nrlit--;
        }
        rez=nrlit/nrcuv;
        g<<rez;

    }



    return 0;
}