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 isDistinct(int n) {
  string s;
  set<char> ens;
  s = to_string(n);
  for (int i = 0; i < s.size(); i++) ens.insert(s[i]);
  if (ens.size() == s.size())
    return true;
  else
    return false;
}
int main() {
  int n;
  cin >> n;
  while (!isDistinct(n + 1)) {
    n++;
  }
  cout << n + 1;
  return 0;
}
