#include <iostream>
#include <string>
#include <fstream>
using namespace std;

bool litera(char c){
    return (c>='a' && c<='z') || (c>='A' && c<='Z');
}

int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    char s;
    bool gatacuvant=false;
    unsigned  nrcuv=0,nrlitere=0;

    while(f.get(s)){
        if(litera(s)){
            nrlitere++;
            if(gatacuvant==false){
                gatacuvant=true;
                nrcuv++;
            }
        }
        else gatacuvant=false;
    }
    g <<  nrlitere  / max(nrcuv,(unsigned)1) ;
    f.close();
    g.close();
    return 0;
}