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;
string s;
int j, n, i, p, l, a[400];
bool q;
set<int> r;
set<int>::iterator it;
int main() {
  cin >> n;
  n++;
  while (q == false) {
    q = true;
    p = n;
    r.clear();
    while (p > 0) {
      it = r.find(p % 10);
      if (it != r.end()) {
        q = false;
        break;
      }
      r.insert(p % 10);
      p /= 10;
    }
    n++;
  }
  cout << n - 1 << endl;
  return 0;
}
