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

int main()
{
    ifstream fin ("text.in");
    ofstream fout ("text.out");
    string s;
    getline (fin, s);
    int nrl = 0, nrc = 0;
    for (int i = 0; i < s.size(); i ++)     {
        if ((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z'))
            nrl ++;
        else {
            if (s[i] != ' ')
                s[i] = ' ';
        }
    }
    for (int i = 0; i < s.size(); i ++)
        if (s[i] == ' ' && s[i - 1] != ' ')
            nrc ++;
    fout << (int) nrl/nrc;
    return 0;
}