1622 - Creating Strings I

using namespace std;
int main(void)
{
    string s;
    vector<string> ans;
    cin >> s;
    sort(s.begin(), s.end());
    do
    {
        ans.push_back(s);
    } while (next_permutation(s.begin(), s.end()));
    cout << ans.size() << endl;
    for (auto a : ans)
        cout << a << endl;
    return 0;
}