#include <fstream.h>
#include <string.h>
int main()
{
 char linie[2029];
 char * tok;
 char delim[]="`1234567890-=+_)(*&^%$#@!~<>?:\"{}|][;'/.,";
 int lcuv, cuv;
 
 ifstream fin("text.in");
 ofstream fout("text.out");

 fin.getline(linie,1028);
 
 cuv=lcuv=0;
 tok=strtok(linie,delim);lcuv+=strlen(tok);
 cuv++;
 while(tok != NULL)
 {
  tok=strtok(NULL,delim);
  lcuv+=strlen(tok);
  cuv++;
 }
 fout<<lcuv/cuv;
 fin.close();fout.close();
 return 0;
}