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;
int main() {
  int sk, a, b, c, d;
  cin >> sk;
  do {
    sk++;
    d = sk % 10;
    c = sk / 10 % 10;
    b = sk / 100 % 10;
    a = sk / 1000;
  } while (a == b || a == c || a == d || b == c || b == d || c == d);
  cout << sk;
  return 0;
}
