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

ifstream f("text.in");
ofstream g("text.out");
int main()
{char s[250],*p;
 int nrDeCuv=0;
 int nrDeLitere=0;
 int mediaCuvant;
    f.get(s,250);
    p=strtok(s," -,.!?");
    while(p!=NULL){
    nrDeCuv++;
    nrDeLitere=nrDeLitere+strlen(p);
    p=strtok(NULL," -,.!?");
    }
    mediaCuvant=nrDeLitere/nrDeCuv;
    g<<mediaCuvant;
    f.close();
    g.close();
    return 0;
}