#include<fstream>
#include<string>
using namespace std;
int n, i, L, nr;
string s;
ifstream fin("text.in");
ofstream fout("text.out");
int main(){
    getline(fin, s);
    n = s.length();
    for(i = 0; i < n; i++){
        if((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z')){
            L++;
            if(i == 0 || !((s[i-1] >= 'a' && s[i-1] <= 'z') || (s[i-1] >= 'A' && s[i-1] <= 'Z'))){
                nr++;
            }
        }
    }
    fout<< L / nr <<"\n";
    return 0;
}