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 num, res;
  cin >> num;
  res = ++num;
  while (true) {
    num = res;
    int n1 = num % 10;
    num /= 10;
    int n2 = num % 10;
    num /= 10;
    int n3 = num % 10;
    num /= 10;
    int n4 = num % 10;
    if ((n1 == n2) || (n1 == n3) || (n1 == n4) || (n2 == n3) || (n2 == n4) ||
        (n3 == n4))
      ++res;
    else
      break;
  }
  cout << res << endl;
  return 0;
}
