qbhv.cpp

#include <bits/stdc++.h>
using namespace std;

int main() {
  string s;
  cin >> s;
  sort(s.begin(), s.end());
  vector<string> res;
  do {
    res.push_back(s);
  } while (next_permutation(s.begin(), s.end()));
  cout << res.size() << '\n';
  for (auto &i : res) cout << i << '\n';
}