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 distinct(int n) {
  set<int> a;
  int i, c = 0;
  while (n > 0) {
    int d = n % 10;
    a.insert(d);
    n /= 10;
  }
  int l = a.size();
  for (int i = 0; i <= l - 1; i++) {
    c++;
  }
  if (c == 4) {
    return true;
  } else {
    return false;
  }
}
int main() {
  int y;
  cin >> y;
  for (int i = y; i <= 10000; i++) {
    if (i > y) {
      if (distinct(i)) {
        cout << i;
        break;
      }
    }
  }
  return 0;
}
