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 isValid(int num) {
  int a[10]{0};
  int digit;
  for (int i = 0; i <= 3; i++) {
    digit = num % 10;
    ++a[digit];
    num = num / 10;
  }
  for (int i = 0; i <= 9; i++) {
    if (a[i] > 1) return false;
  }
  return true;
}
int main() {
  int n;
  cin >> n;
  while (n <= 12345) {
    ++n;
    if (isValid(n)) {
      cout << n << endl;
      return 0;
    }
  }
  return 0;
}
