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
# http://codeforces.com/problemset/problem/271/A

def is_distinct(s):
  s_list = list(s)
  s_set = set(s_list)

  if len(s_list) == len(s_set):
    return True
  else:
    return False

year = int(input())

for i in range(1, 9001):

  year += 1

  if is_distinct(str(year)):
    print(year)
    break

