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

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

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

    In.get(caracter_precedent);
    if(isalpha(caracter_precedent)) {litere++;cuvinte++;}

    while(In.get(caracter))
    {
	if(isalpha(caracter))
	{
		litere++;
		if(!isalpha(caracter_precedent)) cuvinte++;
	}
	caracter_precedent=caracter;
    }

    if(litere && cuvinte) medie=litere/cuvinte;
    Out<<medie<<'\n';

    In.close();
    Out.close();
    return 0;

}