#include <fstream>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    char x;
    bool started=false;
    unsigned long long nrcuv=0, l=0;
    while(fin.get(x))
    {

        if((x>='a' && x<='z') || (x>='A' && x<='Z'))
        {
            if(started==false)
            {
                started=true;
                nrcuv++;
                l++;
            }
            else l++;
        }
        else
        {
            started = false;
        }
    }
    fout<<l/nrcuv;
    fin.close();
    fout.close();
    return 0;
}