#include <iostream>
#include <string>
#include <fstream>

using namespace std;

int nrc, nrt, ma=0, verif;
char ch;

bool verifyChar(char c)
{
  return ((c>='a' && c<='z') || (c>='A' && c<='Z'));
}
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    while (!f.eof()){
        f.get(ch);
        if(verifyChar(ch)){
            nrt++;
            verif=1;
        }
        else{
            if(verif)
                nrc++;
            verif=0;
        }
    }
    g << nrt / nrc;
    return 0;
}