#include <stdio.h>
#include <string.h>
FILE *f,*g;
char s[10000],*p;
int t,m;
int main ()
{f=fopen("text.in","r");
g=fopen("text.out","w");
fgets(s,10000,f);
p=strtok(s," ;,./-'`!?");
{t+=strlen(p); m++;}
while (p!=NULL)
{p=strtok(NULL," ;,!?./-'`");
  {t+=strlen(p); m++;}    }
  m-=1;
  m=t/m;
fprintf(g,"%d",m);
fclose(f);
fclose(g);
return 0;}