It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.

Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.

Input

The single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct. It is guaranteed that the answer exists.

Examples

Input

1987


Output

2013


Input

2013


Output

2014
#include <bits/stdc++.h>
using namespace std;
bool ktra(int n) {
  int vs[10] = {0};
  while (n != 0) {
    int a = n % 10;
    if (vs[a] == 1)
      return false;
    else
      vs[a] = 1;
    n /= 10;
  }
  return true;
}
int main() {
  int n;
  cin >> n;
  int res = 0;
  while (true) {
    if (ktra(n + 1)) {
      res = n + 1;
      break;
    }
    n += 1;
  }
  cout << res << endl;
  return 0;
}
