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 digitsUnique(int year) {
  int digits[4];
  for (int i = 0; i < 4; ++i) {
    digits[i] = year % 10;
    year /= 10;
  }
  sort(digits, digits + 4);
  for (int i = 0; i < 3; ++i) {
    if (digits[i] == digits[i + 1]) {
      return false;
    }
  }
  return true;
}
int main() {
  int year, i;
  cin >> year;
  for (i = year + 1; !(digitsUnique(i)); ++i)
    ;
  cout << i;
  return 0;
}
