#include<iostream.h>
#include<string.h>
#include<fstream.h>
main()
{char c,sep[]=" .,!-?:;",*p;
long long lit,ok,cuv;
ifstream f1("text.in");
ofstream f2("text.out");
lit=0; cuv=0; ok=0;
while (!f1.eof())
{f1.get(c);
 p=strchr(sep,c);
 if (p==NULL)
	{lit++;
	if (ok==0)
		cuv++;
	ok=1;}
 else
 ok=0;
 }

ok=lit/cuv;
f2<<ok;


f1.close();
f2.close();}