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
def is_good_year(y):
  
  digits = {int(i) for i in str(y)}

  if len(digits)==4:
    return True
  else:
    return False


def get_good_year(y):

  y += 1
  while not is_good_year(y):
    y += 1

  return y

year = int(input())

print(get_good_year(year))