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 s;
  cin >> s;
  int i = s + 1;
  for (i; i <= 10000; i++) {
    set<int> ss;
    int m = i;
    for (int j = 0; j < 4; j++) {
      ss.insert(m % 10);
      m = m / 10;
    }
    if (ss.size() == 4) {
      cout << i << endl;
      return 0;
    }
  }
  return 0;
}
