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 check(string x) {
  bool q = true;
  for (int i = 0; i < 4; i++) {
    for (int j = i + 1; j < 4; j++) {
      if (x.at(i) == x.at(j)) {
        q = false;
      }
    }
  }
  return q;
}
int main() {
  int y;
  cin >> y;
  string x;
  for (int i = 1; true; i++) {
    y += 1;
    string z = to_string(y);
    if (check(z) == 1) {
      x = z;
      break;
    }
  }
  cout << x;
}
