#include<fstream.h>
#include<ctype.h>

char caracter,caracter_aux;
unsigned int litere,cuvinte,medie;

main()
{
    ifstream In("text.in");
    ofstream Out("text.out");

    In>>caracter;
    if(isalpha(caracter)) {litere++;cuvinte++;}
    caracter_aux=caracter;

    while(In>>caracter)
    {
	if(isalpha(caracter)) litere++;
	if(isalpha(caracter) && !isalpha(caracter_aux)) cuvinte++;
	caracter_aux=caracter;
    }

    if(litere && cuvinte) medie=litere/cuvinte;
    Out<<medie<<'\n';
    In.close();
    Out.close();
    return 0;   

}