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 n, i, k, r, yr, b, a[4];
  scanf("%d", &yr);
  while (1) {
    yr++;
    n = yr;
    for (i = 0; n > 0; i++) {
      r = n % 10;
      a[i] = r;
      n = n / 10;
    }
    b = 0;
    while (1) {
      k = 0;
      for (i = 0; i < 4; i++) {
        if (a[i] == b) k++;
      }
      if (b > 9 || k > 1) break;
      b++;
    }
    if (k == 0) {
      printf("%d\n", yr);
      break;
    }
  }
  return 0;
}
