//
//  main.cpp
//  Alex
//
//  Created by Hurjui Alexandru Mihai on 02/11/2018.
//  Copyright © 2019 Hurjui Alexandru Mihai. All rights reserved.
//

#include <fstream>
#include <string>
using namespace std;

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

bool lit(char x)
{
    if ((x >= 65 && x <= 90) || (x >= 97 && x<=122))
        return 1;
    return 0;
}

int main()
{
    string x;
    int i, nr = 0, lgg;
    getline(fin, x);
    lgg = x.size();
    for (i = 0; i<lgg; i++)
    {
        if (lit(x[i]) == 0)
            nr++;
    }
    nr++;
    fout << lgg/nr;
    return 0;
}