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.

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'''
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
	 	   	 		 		    		 		  	 	 		