#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <ctype.h>
#include <cstring>

using namespace std;

int main()
{
    char c;int nc=0,lt=0;
    ifstream f("text.in");
    ofstream g("text.out");
    while(!f.eof())
    {
        f>>c;
        if(isalpha(c))
        {
            lt++;
            if(!isalpha(f.peek()))
                nc++;
        }
    }
    g<<lt/nc;
    return 0;
}