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 abs(int i) { return i > 0 ? i : -i; }
bool dist(int i) {
  bool a[10] = {};
  while (i) {
    if (a[i % 10] == 1)
      return false;
    else
      a[i % 10] = 1;
    i /= 10;
  }
  return true;
}
int main() {
  int n;
  cin >> n;
  for (int i = n + 1; i < 9020; i++) {
    if (dist(i)) {
      cout << i;
      break;
    }
  }
  return 0;
}
