#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;

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

char s;
int cuv, lung, ok;

int main()
{
    while(fin.get(s))
    {

        if(((s>='A') && (s<='Z'))|| ((s>='a') && (s<='z')))
         {
             lung++;
             ok=1;
             }
        else if(ok)
            {cuv++;
              ok=0;}


    }
    fout<<lung/cuv;
    return 0;
}