#include <fstream>
#include <string>
using namespace std;
int main()
{
    int cuv=0,i,n,lit=0,k=0;
    char x;
    ifstream f("text.in");
    while ( f.get(x) )
    {if( (x>='a' && x<='z') || (x>='A' && x<='Z') )
        {lit++;
        k=1;}
        else
            if(k)
            {k=0;
            cuv++;}
    }
    f.close();
    ofstream g("text.out");
    g<<lit/cuv;
    return 0;
}

4