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.
y=int(input())
p=y+1
def test(k):
    ch=str(k)
    for i in range(len(ch)):
        for j in range(i + 1, len(ch)):
            if ch[i] == ch[j]:
                return False

    return True
ok=False
while ok==False:
    if test(p):
        print(p)
        ok=True
    else:
        p=p+1