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 f(int n) {
  int a[6];
  int i = 0;
  while (n != 0) {
    int k = 0;
    for (int j = 0; j < i; j++)
      if (a[j] == n % 10) k++;
    if (k > 0) return 0;
    a[i] = n % 10;
    i++;
    n -= n % 10;
    n /= 10;
  }
  return 1;
}
int main() {
  int y;
  cin >> y;
  int x = y + 1;
  while (f(x) != 1) {
    x++;
  }
  cout << x;
  return 0;
}
