#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

ifstream in("text.in");
ofstream out("text.out");

string s;
int l,nr_litere=0,cuv=0;
bool ok=false;

bool check(char x){
    if ((x>='a' && x<='z') || (x>='A' && x<='Z')) return true;
    return false;
}

int main()
{
    getline(in, s);
    l=s.size();

    for (int i=0; i<=l-1; i++){
        if (check(s[i]))
            nr_litere++, ok=true;
        if (check(s[i])==false && ok==true)
            cuv++, ok=false;
    }

    out << int(nr_litere/cuv) << "\n";

    return 0;
}