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 main() {
  int n;
  cin >> n;
  for (int i = n + 1; i < 10000; i++) {
    set<int> s;
    s.insert(i / 1000);
    s.insert(i % 1000 / 100);
    s.insert(i % 100 / 10);
    s.insert(i % 10);
    if (s.size() == 4) {
      cout << i;
      return 0;
    }
  }
}
