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 is_uni(string y) {
  sort(y.begin(), y.end());
  for (int i = 0; i < y.size() - 1; i++)
    if (y[i] == y[i + 1]) return false;
  return true;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int y;
  cin >> y;
  int i = y + 1;
  for (;; i++)
    if (is_uni(to_string(i))) break;
  cout << i;
}
