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 Beautiful(int year) {
  int Digit[4] = {-1, -1, -1, -1};
  int fill = 0;
  int digit;
  while (year) {
    digit = year % 10;
    for (int i = 0; i < fill; i++) {
      if (digit == Digit[i]) {
        return 0;
      }
    }
    Digit[fill++] = digit;
    year /= 10;
  }
  return 1;
}
int main() {
  int year;
  int flag = 0;
  scanf("%d", &year);
  while (!flag) {
    if (Beautiful(++year)) {
      printf("%d\n", year);
      flag = 1;
    }
  }
}
