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
min_year = int(input())
year = min_year + 1
dist_year = 0
digits = ''
while dist_year == 0:
  year = str(year)
  for digit in year:
    if digit not in digits:
      digits += digit
  if len(digits) == 4:
    dist_year = year
    print(dist_year)
  else:
    year = int(year) + 1
    digits = ''