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>
int main() {
  int year, i, flag = 0, j;
  int s[4];
  scanf("%d", &year);
  for (i = 1;; i++) {
    year = year + 1;
    int t = year;
    for (i = 0; i < 4; i++) {
      s[i] = t % 10;
      t = t / 10;
    }
    for (i = 0; i < 4; i++) {
      for (j = i + 1; j < 4; j++) {
        if (s[i] != s[j]) {
          flag = flag + 1;
          ;
        }
      }
    }
    if (flag == 6) break;
    flag = 0;
  }
  printf("%d", year);
}
