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;
const int MOD = 1000000000 + 7;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  cout.tie(nullptr);
  int m;
  cin >> m;
  m++;
  while (true) {
    unordered_map<char, int> mp;
    int c = m;
    bool res = 0;
    while (c != 0) {
      mp[c % 10]++;
      if (mp[c % 10] > 1) goto end;
      c = c / 10;
    }
    goto z;
  end:
    m++;
  }
z:
  cout << m;
  cout << "\n";
}
