#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int main()
{
    char c;
    int ok=0,nr=0,lungime=0;
    while(f>>noskipws>>c)
    {
        if(isalpha(c))
        {
            lungime++;
            if(ok==0)
            {
                nr++;
                ok=1;
            }
        }
        else
            ok=0;
    }
    g<<lungime/nr;
    return 0;
}