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
    return False
    
N=int(input())
while True:
    N+=1
    if norepeat(N):
        print(N)
        break###
 			    	  	  				 					 			  	