c++ brute-force code unfinish

#include <iostream>
#include <string>

using namespace std;

int main()
{
    string password;
    cout << "Enter a string password = ";
    cin >> password;
    string alphabetslow = "abcdefghijklmnopqrstuvwxyz" ;
    string alphabetsup = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    string numerics = "123456789" ;
    string bruted;
    int counts = 0;
    int i;


        do {
        cout << "Brute-forcing... \n";
        for ( i = 0; i < 26; i++) {
            if (password[counts] == alphabetsup[i]) {
                bruted += alphabetsup[i];
                counts++;
            } else if (password[counts] == alphabetslow[i]) {
                bruted += alphabetslow[i];
                counts++;
            }
        }


    } while (password != bruted);



    cout << "Brute-Forced password is = ";
    cout << bruted << endl;


    return 0;
}