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 n) {
  int i = 0, a[4], j;
  while (n) {
    a[i++] = n % 10;
    n /= 10;
  }
  for (i = 0; i < 4; i++) {
    for (j = i + 1; j < 4; j++) {
      if ((a[i] == a[j])) return false;
    }
  }
  return true;
}
int main() {
  int i, n;
  while (cin >> n) {
    for (i = n + 1;; i++) {
      if (check(i)) {
        cout << i << endl;
        break;
      }
    }
  }
  return 0;
}
