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.
The single line contains integer *y* (1000 ≤ *y* ≤ 9000) — the year number.
def norepeat(A):
     if len(set(str(A)))==len(str(A)):
          return True
      else:
          return False 
A=int(input())
while True:
       A+=1
       if norepeat(A):
          print(A)
          break;

		 				     	 		  	  		 		 		 	