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 func(int n) {
  string s;
  stringstream ss;
  ss << n;
  ss >> s;
  unordered_map<char, int> mp;
  for (long long i = 0; i < s.length(); i++) {
    mp[s[i]]++;
  }
  for (auto x : mp) {
    if (x.second != 1) return false;
  }
  return true;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  long long year;
  cin >> year;
  for (long long n = year + 1;; n++) {
    if (func(n)) {
      cout << n << endl;
      break;
    } else
      continue;
  }
  return 0;
}
