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 isDistinct(int n) {
  int x[10] = {}, j;
  for (j = 3; j > -1; j--) {
    if (x[n % 10]++) {
      break;
    }
    n /= 10;
  }
  return !n;
}
int main() {
  int n, i;
  scanf("%d", &n);
  for (i = n + 1; i < 9013; i++) {
    if (isDistinct(i)) {
      printf("%d\n", i);
      return 0;
    }
  }
}
