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(n):
   if len(set(str(n)))==len(str(n)):
       return true
   else:
         return false


n=int(input())
white true:
      n+=1
      if norepeat(n):
           print(n)
           break;##vh
   

	  	      			 		 	    		   	 	