#include<fstream>
using namespace std;

bool Verificare(char x)
{
    return ( ('a'<=x && x<='z') || ('A'<=x && x<='Z'));
}
 
int main ()
{
    char x;
    int nrcuv=0,nrlit=0,cuv=0;
	
    ifstream fin("text.in");
    while(fin.get(x))
    {
        if(Verificare(x))
        {
            nrlit++;
            if(cuv == 0)
            {
                nrcuv++;
                cuv = 1;
            }
        }
        else cuv = 0;
    }
    fin.close();
     
    ofstream fout("text.out");
    fout<<(nrlit/nrcuv)<<"\n";
    fout.close();
    return 0;
}