#include <fstream>
#include <cctype>

using namespace std;

int main()
{
    ifstream input("text.in");

    int words = 0, len = 0;
    char c;
    bool ok = true;

    while(input.get(c))
    {
        if (isalpha(c))
        {
            if(!ok)
                words++;
            len++;
            ok = false;
        } else ok = true;
    }
    int result = 0;
    if (words)
        result = len / words;

    ofstream output("text.out");
    output << result;

    return 0;
}