#include <fstream>
#include <string>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
int main()
{
    int nrc=0,nrl=0;
    bool da;
    char x;
    //in.getline(s,1048599,'\n');
    while(in.get(x))
    {
        if((x>=65 && x<=90) || (x>=97 && x<=122))
            {
                nrl++;
                da=1;
            }
        else
            {
                if(da)
                    nrc++;
                da=0;
            }
    }
    nrl=nrl/nrc;
    out<<nrl<<"\n";
    out.close();
    return 0;
}