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 isbeautiful(n):
  i=n%10
  j=int(n/10)%10
  k=int(n/100)%10
  l=int(n/1000)%10
  #print(i,j,k,l)
  if(i!=j and j!=k and k!=l and i!=k and i!=l and j!=l):
    return 1
  else:
    return 0

def main():
  n=int(input())
  for i in range(n+1,9020):
    res=isbeautiful(i)
    if(res==1):
      print(i)
      break
main()