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_beautiful(n):
  digits = {}
  while n > 0:
    d = n % 10
    if d not in digits:
      digits[d] = 0

    digits[d] += 1
    if digits[d] > 1:
      return False
    n = n // 10

  return True

n = int(input()) + 1

while True:
  if is_beautiful(n):
    print(n)
    exit(0)
  n += 1
