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 distdig(n):
  s=str(n);l=[]
  for i in s:
    l.append(i)
  l=list(set(l))
  k=len(l)
  del l
  return k

def nextnum(n):
  while True:
    dist=distdig(n+1)
    total=4
    if dist==total:
      return n+1
    else:
      n+=1

n=int(input())
print(nextnum(n))