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() {
  long int len, check = 1, c, i, y, a[10];
  cin >> y;
  y++;
  while (check) {
    c = y;
    for (i = 0; c > 0; i++) {
      a[i] = c % 10;
      c /= 10;
    }
    sort(a, a + (i));
    len = i;
    for (i = 0; i < len; i++) {
      if (a[i] == a[i + 1])
        break;
      else if (i == len - 1) {
        cout << y;
        check = 0;
      }
    }
    y++;
  }
  return 0;
}
