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 y;
  cin >> y;
  y++;
  while (1) {
    int flag = 1;
    int num[10] = {0};
    int temp = y;
    while (temp) {
      if (num[temp % 10]) {
        flag = 0;
        break;
      }
      num[temp % 10]++;
      temp /= 10;
    }
    if (flag) {
      cout << y;
      break;
    }
    y++;
  }
  return 0;
}
