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
n=input()
n=int(n)
ls=[]
for x in range(1000,9013):
  x=str(x)
  year_set=set(x)
  year_list=list(x)
  if len(year_set)==len(year_list):
      ls.append(x)
m=0
if n in ls:
    print(n)
else:
    for t in ls:
        t=int(t)
        if t>n:
            m=t
            break
    print(m)
