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.
x = input().split()
c = "".join(x)
n = int(c)
y = n + 1
v = str(y)
while x:
    if len(v)== len(set(v)):
        print(y)
        break
    else:
        y += 1
        v = str(y)
        