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 test(int x) {
  scanf("%d", &x);
  int a, b, c, d;
  a = x / 1000;
  b = x / 100 % 10;
  c = x / 10 % 10;
  d = x % 10;
  return (a != b && a != c && a != d && b != d && b != c && c != d);
}
int main() {
  int n;
  scanf("%d", &n);
  while (!test(++n))
    ;
  printf("%d", n);
}
