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 main() {
  int n;
  cin >> n;
  n++;
  while (1) {
    vector<bool> a(10, 0);
    a[n / 1000] = 1;
    a[n / 100 % 10] = 1;
    a[n / 10 % 10] = 1;
    a[n % 10] = 1;
    int sum = 0;
    for (int i = 0; i <= 9; i++) sum += a[i];
    if (sum == 4) break;
    n++;
  }
  cout << n;
}
