#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;

    while (in.get(t))
    {
        #if DEBUG
            cout << "t(" << t << ") ";
        #endif
        if (!swL && ((t>='a'&&t<='z')||(t>='A'&&t<='Z')))
        {
            swL = 1;
        }
        if (swL)
        {
            if (((t>='a'&&t<='z')||(t>='A'&&t<='Z'))) ++l;
            else
            {
                ++c;
                swL = 0;
            }
        }
    }

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

    return 0;
}