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;
int difDigits(int y) {
  set<int> x;
  x.insert(y % 10);
  y /= 10;
  x.insert(y % 10);
  y /= 10;
  x.insert(y % 10);
  y /= 10;
  x.insert(y % 10);
  y /= 10;
  return x.size();
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int year;
  cin >> year;
  for (int i = year + 1; i < 9013; ++i)
    if (difDigits(i) == 4) {
      cout << i;
      break;
    }
  return 0;
}
