#include <fstream>

using namespace std;

int main()
{
    int len, i, l = 0, n = 0;
    string str;

    ifstream infile;
    infile.open("text.in");
    ofstream outfile;
    outfile.open("text.out");

    getline(infile, str);

    len = str.length();
    string a[len];
    for(i=0; i < len; i++)
        a[i] = str[i];
    for (i = 1; i < len; i += 1) {
        if ((a[i] == " ") || (a[i] == "-"))
        {
            n++;
        }
        if (isalpha(str[i])){
            l++;
        }
    }


    outfile << l / n;

    infile.close();
    outfile.close();

    return 0;
}