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;
template <class T>
T sqr(T a) {
  return a * a;
}
bool ok(int a) {
  int was[200] = {0};
  while (a) {
    int k = a % 10;
    a /= 10;
    if (was[k]) return 0;
    was[k] = 1;
  }
  return 1;
}
int main() {
  int a;
  cin >> a;
  for (int i = a + 1;; ++i) {
    if (ok(i)) {
      cout << i;
      return 0;
    }
  }
  return 0;
}
