#include <fstream>

#define DEBUG 0
#if DEBUG
    #include <iostream>
#endif

using namespace std;

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

    int l = 0, c = 0;
    char t;
    bool swL = false;
    bool swC = false;

    while (in.get(t))
    {
        #if DEBUG
            cout << "t(" << t << ") ";
        #endif
        if ((t>='a'&&t<='z')||(t>='A'&&t<='Z'))
        {
            ++l;
            swC = true;

            #if DEBUG
                cout << "l(" << l << ") swC(" << swC << ") swL(" << swL << ") c(" << c << ")\n";
            #endif

            if (swL)
            {
                ++c;
                swL = false;
                #if DEBUG
                    cout << "c(" << c << ")\n";
                #endif
            }
        }
        else if (t=='-')
        {
            #if DEBUG
                cout << "swL(1)\n";
            #endif
            swL = true;
        }
        else if (swC)
        {
            ++c;
            swC = false;
            #if DEBUG
                cout << "c(" << c << ")\n";
            #endif
        }
    }

    --c;

    #if DEBUG
        cout << l/c;
    #endif
    out << l/c;

    return 0;
}