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 isBeautiful(int n) {
  bool flag[10];
  for (int i = 0; i < 10; i++) flag[i] = false;
  while (n > 0) {
    int digit = n % 10;
    if (flag[digit]) return false;
    flag[digit] = true;
    n = n / 10;
  }
  return true;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n;
  cin >> n;
  if (isBeautiful(n)) n++;
  while (!isBeautiful(n)) {
    n++;
  }
  cout << n;
  return 0;
}
