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(int y) {
  int a, b, c, d;
  a = y % 10;
  y = y / 10;
  b = y % 10;
  y = y / 10;
  c = y % 10;
  y = y / 10;
  d = y % 10;
  if (a != b && a != c && a != d && b != c && b != d && c != d)
    return true;
  else
    return false;
}
int main() {
  int n;
  cin >> n;
  while (true) {
    n++;
    if (check(n)) break;
  }
  cout << n << endl;
}
