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;
bool ok(int x) {
  bool f[10];
  memset(f, 1, sizeof(f));
  while (x > 0) {
    int y = x % 10;
    x /= 10;
    if (f[y] == 1)
      f[y] = 0;
    else
      return 0;
  }
  return 1;
}
int main() {
  int n;
  cin >> n;
  for (int i = n + 1; i <= 20000; i++)
    if (ok(i)) {
      cout << i;
      return 0;
    };
}
