#include <iostream>
#include <fstream>
#include <string>
using namespace std;
string s;
int i, nr, nri;
int main()
{
    ifstream f ("text.in");
    ofstream g ("text.out");
    getline (f,s);
    for (i=0;i<=s.length();i++)
    {
    if (isalpha(s[i]))
        nr++;
    if ((s[i]==' ') || (s[i]=='-' && s[0]!='-'))
        nri++;
    }
    nri++;
    g<<nr/nri;
    return 0;

}