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 unique(int x) {
  stringstream ss;
  ss << x;
  string h;
  ss >> h;
  if (h[0] != h[1] && h[0] != h[2] && h[0] != h[3] && h[1] != h[2] &&
      h[3] != h[1] && h[2] != h[3]) {
    return true;
  } else {
    return false;
  }
}
int main() {
  int x;
  bool k = true;
  cin >> x;
  while (k) {
    x++;
    if (unique(x)) {
      cout << x;
      k = false;
    }
  }
}
