#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>>caracter_precedent;
    if(isalpha(caracter_precedent)) {litere++;cuvinte++;}

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

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

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

}