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;
int main() {
  char y[4];
  cin >> y;
  for (int i = 3; i >= 0;) {
    if (y[i] == '9') {
      y[i] = '0';
      i--;
    } else {
      y[i] += 1;
      if (i != 3) {
        i = 3;
      }
    }
    if (i == 3) {
      bool same = 0;
      for (int j = 0; j < 4; j++) {
        for (int k = j + 1; k < 4; k++) {
          if (y[j] == y[k]) {
            same = 1;
            break;
          }
        }
        if (same) {
          break;
        }
      }
      if (!same) {
        cout << y;
        break;
      }
    }
  }
  return 0;
}
