#include <iostream>
#include <string.h>
#include <fstream>
using namespace std;

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

    char c[10000];
    fin.get(c, 10000);
    //cout << c;
    int nr_cuvinte = 0;
    int nr_litere = 0;
    int in_cuvant = 0;
    for(int i = 0; c[i]; i++)
    {
        if(c[i] >= 'A' && c[i] <= 'z')
        {
                nr_litere++;
                in_cuvant = 1;
        }
        else
        {
            if(in_cuvant == 1)
            {
                nr_cuvinte++;
                in_cuvant = 0;
            }
        }
    }
    cout << nr_litere / nr_cuvinte;
    return 0;
}