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 INF = 1000000000;
int main() {
  ios_base::sync_with_stdio(false);
  int y;
  cin >> y;
  while (true) {
    int tem = y + 1;
    set<int> st;
    for (long long i = 0; i < 4; ++i) {
      st.insert(tem % 10);
      tem /= 10;
    }
    if (((int)(st).size()) == 4) {
      cout << y + 1;
      return 0;
    } else {
      ++y;
    }
  }
  return 0;
}
