#include <bits/stdc++.h>
using namespace std;

const string file_name = "text";
ifstream fin(file_name + ".in");
ofstream fout(file_name + ".out");

string x;
int cuv, nmax;

int main()
{
    getline(fin, x);

    for(int i = 0; i < x.size(); i++){
        //cout << x[i];
        if(x[i] == ' '){
            cuv++;
        }
        if(isalpha(x[i])){
            nmax++;
        }
    }

    cuv++;

    fout << nmax / cuv;


    return 0;
}