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;
short v[5];
int main() {
  int n, ok = 0, x, i = 4;
  ios_base::sync_with_stdio(false);
  cin >> n;
  ++n;
  while (!ok) {
    ok = 1;
    x = n;
    i = 4;
    while (x) v[i] = x % 10, --i, x /= 10;
    sort(v + 1, v + 5);
    for (i = 2; i <= 4; ++i)
      if (v[i] == v[i - 1]) ok = 0;
    if (ok) cout << n;
    ++n;
  }
  return 0;
}
