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 y, a[4], j, i, k, c, rem, d, n;
  scanf("%d", &y);
  for (i = y + 1;; i++) {
    c = 0;
    n = i;
    for (j = 0; j < 4; j++) {
      d = n;
      n /= 10;
      rem = d - 10 * n;
      a[j] = rem;
      for (k = 0; k < j; k++) {
        if (a[j] != a[k]) c++;
      }
    }
    if (c == 6) {
      printf("%d", i);
      break;
    }
  }
}
