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 isdistinct(string s) {
  int arr[200] = {0};
  for (int i = 0; i < s.length(); i++) {
    if (arr[s[i]] != 0) return false;
    arr[s[i]] = 1;
  }
  return true;
}
int main() {
  int y;
  cin >> y;
  for (int i = y + 1; i <= 9020; i++) {
    string s = to_string(i);
    if (isdistinct(s)) {
      cout << s << endl;
      break;
    }
  }
}
