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

using namespace std;

ifstream in;
ofstream out;

string s;

int nrc, nrl,i,j;

int main()
{
    in.open("text.in");
    out.open("text.out");

    char ch;
    int ok = 0;
    while(in.get(ch))
    {
        if (isalpha(ch))
        {
            if (ok == 0)
            {
                ok = 1;
                nrc++;
            }
            nrl++;
            
        }
        else
            ok=0;
    }
    out << nrl/nrc;
}