#include<iostream>
#include<fstream>
#include<cstring>
#include<cctype>
using namespace std;
int main ()
{   //isalpha(s[i])-litera sau nu
	char s[90];
	int n=0,k=0,i=0;
	bool inw;
	/*cout<<"introdu sirul:";
	cin.getline(s,90);
	cout<<"ati introdus sirul:"<<s<<endl;*/
	std::ifstream f("text.in");
	std::ofstream g("text.out");
	while(!f.eof())
	{i++;
	 f>>s[i];	
	}
	for(i=1;s[i] !='\0'; i++)
    { if(isalpha(s[i]) && !(inw))
        {n++;
         inw = true;
		}
	  if(isalpha(s[i]))k++;
	  if(!isalpha(s[i]))
	    inw =false;
	}
	g<<k/n;
	g.close();
   /*	cout<<"sirul contine "<<n<<" cuvinte si "<<k<<" litere"<<endl;*/	
}