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 helper(int n);
int main() {
  int n;
  cin >> n;
  while (helper(++n))
    ;
  cout << n;
  return 0;
}
bool helper(int n) {
  unordered_set<int> s;
  while (n != 0) {
    int pop = n % 10;
    if (s.count(pop) != 0) return true;
    n /= 10;
    s.insert(pop);
  }
  return false;
}
