//#include <fstream>
//#include <iostream>
#include <bits/stdc++.h>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char t,c;
int len,cuv,nou;
int main()
{
    f>>t;
    while(f.get(c))
    {
        if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        {
            len++;

            if(!((t>='a'&&t<='z')||(t>='A'&&t<='Z')))
            {
                cuv++;
               // g<<c<<'\n';
                //nou=1;
            }
            //nou=1;
        }
        //else nou=0;
        t=c;


    }
    g<<len/cuv;

    return 0;
}