#include <iostream>
#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int cuv,nr,lit;
char c;
int main(){
 while(f.get(c)){
  if((c>='A' && c<='Z') || (c>='a' && c<='z')){
   if(cuv==0){
    cuv=1;
    nr++;
    }
    lit++;
    }
   else cuv=0;
    }
 g<<lit/nr;
}