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 has_distinct_digits(year):
    # Convert the year to a string to work with its digits
    year_str = str(year)
    
    # Check if all digits are distinct
    return len(year_str) == len(set(year_str))

y = int(input())

while True:
    y += 1
    if has_distinct_digits(y):
        print(y)
        break

 		  	 	  	    		  	   		   	 	