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(d):
     if len(set(str(d)))==len(str(d)):
          return True
     else:
          return False 

d=int(input())
while True:
    d+=1
    if norepeat(d):
       print(d)
       break;

	  	 	  	  			 		 					 	 			 	