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.
year = int(input())



i = 0

while True:
    str(year)
    yearList = list(map(int, str(year)))
    yearNumbers = [el for el in yearList]
    dup = {x for x in yearNumbers if yearNumbers.count(x) > 1}
    int(year)
    if len(dup) == 0:
        print(year)
        break
    year += 1