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 y, a, b, c, d, temp;
  while (cin >> y) {
    temp = y + 1;
    while (temp != 0) {
      a = temp % 10;
      b = (temp % 100) / 10;
      c = (temp % 1000) / 100;
      d = temp / 1000;
      if (a == b || b == c || c == d || d == a || d == b || a == c)
        temp++;
      else
        break;
    }
    cout << temp << endl;
  }
  return 0;
}
