#include <fstream>

using namespace std;

int main()
{
    int hossz=0, db=0;
    char c, cel;
    ifstream f("text.in");
    f.get(c);
    if (!isalpha(c)) db=1;
    while (!f.eof())
    {
        cel=c;
        f.get(c);
        if (isalpha(c)) hossz++;
        else if (isalpha(cel)) db++;
    }
    f.close();
    ofstream g("text.out");
    g<<hossz/db;
    g.close();
}