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 cmp ( n ):
   ch = str(n)
   if ( ch[0] != ch[1] ) and ( ch[0] != ch[2] )and ( ch[0] != ch[3] )and ( ch[2] != ch[1] )and ( ch[3] != ch[1] )and ( ch[3] != ch[2] ):
      return True
stop = True
n = input()
while  stop :
   n=n+1
   if cmp(n):
      print(n)
      stop = False
      
