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
a=int(input())
t=0
if a>=0 and a<=9:
 print(a+1)
else:
 p=a
 while t==0:
  a=p+1
  p=a
  l=set()
  while a!=0:
   l.add(a%10)
   a=a/10
  'print(len(str(p)),p,len(l))'
  if len(str(p))==len(l):
   t=1
   print(p)
  
 