#include <fstream>
#include <cstring>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char c,clast;int nr_lit,nr_cuv;
#define litera(c) ((c>='A'&&c<='Z')||(c>='a'&&c<='z'))
int main()
{
    while(f.get(c))
    {
        if(litera(c))
            nr_lit++;
        if(!litera(clast)&&litera(c))
            nr_cuv++;
        clast=c;
    }
    //g<<nr_lit<<" "<<nr_cuv;
    g<<nr_lit/nr_cuv;
    return 0;
}