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;
bool check(int y) {
  set<int> s;
  while (y) {
    if (s.count(y % 10)) return 0;
    s.insert(y % 10);
    y /= 10;
  }
  return 1;
}
int main() {
  int y;
  scanf("%d", &y);
  ++y;
  while (!check(y)) ++y;
  cout << y << endl;
  return 0;
}
