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 dis_d(x):
    D = set(str(x))
    return len(D) == len(str(x))

def fing_2(year):
    year += 1
    while not dis_d(year):
        year += 1
    return year

x = int(input())
ndy = fing_2(x)
print(ndy)
					  		 	   	  			  		    	