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;
const int MOD = 1e9 + 7;
bool check(int a) {
  stringstream ss;
  ss << a;
  string str = ss.str();
  for (int j = 0; j < str.size(); j++) {
    for (int k = j + 1; k < str.size(); k++)
      if (str[j] == str[k]) return false;
  }
  return true;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  int n;
  cin >> n;
  for (int i = n + 1;; i++)
    if (check(i)) return cout << i, 0;
  ;
  return 0;
}
