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;

					 					 			 					 	 		 	