#include

#include

using namespace std;

int main()

{

    srand(time(0));

    int max = 1 + rand() % 15;

    int i = 0;

    while (i < max) {

        char c = 'a' + rand() % 2;

        cout << c << \" \";

        i++;

        if (c == 'a'){

            if (i == max)

                cout << \"YES\n\";

while (i < max) {

                c = 'a' + rand() % 2;

                cout << c << \" \";

                i++;

                if (c == 'a' && i == max) {

                    cout << \"\nYES\n\";

}

                else if (i == max) {

                    cout << \"\nNO\n\";

                }

            }

        }

        else {

            while (i < max) {

                c = 'a' + rand() % 2;

                cout << c << \" \";

                i++;

            }

            cout << \"\nNO\n\";

        }

    }

return 0;

}

---