#include<fstream>
#include<string>
#include<iostream>
using namespace std;

inline bool ver(char ch)
{
    if((ch<='z'&&ch>='a')||(ch<='Z'&&ch>='A'))
     return true;
    else
     return false;
}

int main()
{
    string lin;
    int i,c=0;
    unsigned int car=0;
    ifstream fin("text.in");
    ofstream fout("text.out");

    while(!fin.eof())
    {
         getline(fin,lin);

         i=0;
        for(i=0;i<lin.length();i++)
        if(ver(lin[i]))
          car++;
         else if(lin[i]==' '||(lin[i]=='-'&&ver(lin[i+1])))
          c++;
    }
    fin.close();
    cout<<c;
    fout<<car/c;
    fout.close();
}