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 isUnique(string s) {
  for (int i = 0; i < 4; i++) {
    for (int j = i + 1; j < 4; j++)
      if (s[i] == s[j]) return false;
  }
  return true;
}
int main() {
  int n;
  cin >> n;
  while (n < 9012) {
    n++;
    string x = to_string(n);
    if (isUnique(x)) {
      cout << x << endl;
      break;
    }
  }
}
