#include <fstream>
#include <cstring>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char a[1000000];
char copie[1000000][1000000];
char *b;
int main()
{ int numar=0;
  int i=0;
  f.getline(a,1000);
  b = strtok (a," !@#$%^&*()_+-=[]{}|:,./;[]\<>?%'\n'*,.-");
  strcpy(copie[i],b);
  numar+=strlen(copie[i]);
  while (b != NULL)
  {  b= strtok (NULL, " !@#$%^&*()_+-=[]{}|:,./;[]\<>?%'\n'*,.-");
     if(b != NULL)
     strcpy(copie[i],b);
     numar+=strlen(copie[i]);
     i++;
  }
  g<<numar/i;
    return 0;
}