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>
using namespace std;
int main() {
  int y, a, b, c, d, count = 0;
  while (scanf("%d", &y) != EOF) {
    while (y > 0) {
      y++;
      a = y / 1000;
      b = (y % 1000) / 100;
      c = ((y % 1000) % 100) / 10;
      d = ((y % 1000) % 100) % 10;
      if (a != b && a != c && a != d && d != c && d != b && c != b) break;
    }
    printf("%d\n", y);
  }
}
