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() {
  char a, b, c, d, i, j, k, l;
  int ans;
  scanf("%c%c%c%c", &a, &b, &c, &d);
  d++;
  for (i = a; i <= 57; i++) {
    for (j = b; j <= 57; j++) {
      for (k = c; k <= 57; k++) {
        for (l = d; l <= 57; l++) {
          if (l != k && l != j && l != i)
            if (k != j && k != i)
              if (j != i) goto P;
        }
        d = '0';
      }
      c = '0';
    }
    b = '0';
  }
P:
  printf("%c%c%c%c", i, j, k, l);
  return 0;
}
