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 check(int n) {
  int rem, a;
  a = n;
  set<int> s;
  int flag = 0;
  for (;;) {
    if (n == 0) break;
    rem = n % 10;
    n = n / 10;
    s.insert(rem);
  }
  int sz = s.size();
  if (sz == 4) {
    cout << a << endl;
    flag = 1;
  }
  return flag;
}
int main() {
  int y;
  cin >> y;
  int key;
  for (int i = 1; i <= 9001; i++) {
    y++;
    key = check(y);
    if (key != 0) {
      break;
    }
  }
  return 0;
}
