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;
  while (1) {
    n++;
    int x = n;
    bool f = 0;
    map<int, bool> vis;
    while (x) {
      int a = x % 10;
      if (!vis[a])
        vis[a] = 1;
      else {
        f = 1;
        break;
      }
      x /= 10;
    }
    if (!f) {
      cout << n << "\n";
      return 0;
    }
  }
  return 0;
}
