#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

char sir;

int main()
{
    int cuv=0,lit=0,S=0;
    while(fin.get(sir))
    {
        cout<<sir;
        if('a'<=sir&&sir<='z'||'A'<=sir&&sir<='Z')
            lit++;
        else
        {
            if(lit>0)
                cuv++;
            S=S+lit;
            lit=0;
        }
    }
    fout<<S/cuv;
    fin.close();
    fout.close();
    return 0;
}