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 check(int n) {
  int A[10];
  for (int i = 0; i < 10; i++) A[i] = 0;
  while (n) {
    A[n % 10]++;
    n /= 10;
  }
  for (int i = 0; i < 10; i++)
    if (A[i] > 1) return 0;
  return 1;
}
int main() {
  int n;
  cin >> n;
  n++;
  while (check(n) == 0) n++;
  cout << n;
}
