#include<fstream.h>
#include<string.h>
#include<ctype.h>
int i,x=0,s,n,nr;
char sir[256],*p;
int main()
{ifstream f("text.in");
ofstream g("text.out");
f.get(sir,256);
p=strtok(sir," ,./?;:'|[{]}!%^&*()_+=-");
while(p!=NULL)
{n++;p=strtok(NULL," ,./?;:'|[{]}~!%^&*()_+=-");
nr=strlen(p);
s=s+nr;}
if(s!=0&&n!=0)
g<<s/n;
f.close();
g.close();
return 0;}