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 a;
int pd(int x) {
  int a, b, c, d;
  a = x % 10;
  b = x / 10 % 10;
  c = x / 100 % 10;
  d = x / 1000 % 10;
  if (a != b && a != c && a != d && b != c && b != d && c != d)
    return 1;
  else
    return 0;
}
int main() {
  scanf("%d", &a);
  a = a + 1;
  while (1) {
    int x = 0;
    x = pd(a);
    if (x == 1) break;
    a++;
  }
  printf("%d", a);
}
