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;
char pr(char c) {
  if ('a' <= c && c <= 'z')
    return char(c - 32);
  else
    return c;
}
int x;
bool t = true;
int main() {
  ios_base::sync_with_stdio(false);
  cin >> x;
  while (t) {
    t = false;
    x++;
    map<int, int> a;
    int d = x;
    while (d != 0) {
      a[d % 10]++;
      if (a[d % 10] > 1) t = true;
      d /= 10;
    }
  }
  cout << x;
  return 0;
}
