#include <iostream>
#include <fstream>
using namespace std;
long long k,i,m,x,j,ct,ct1,ok;
char c;
int main()
{
    ifstream fin("text.in");
    ofstream fout("text.out");
    for(ct=0,ct1=0;fin.get(c);)
    {
        if(isalpha(c))
        {
            ct1++;
            ok=1;
        }
        else
        {
            if(ok==1)
                ct++;
            ok=0;
        }
    }
    fout<<ct1/ct<<endl;
    return 0;
}