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.
if __name__ == "__main__":
    year = int("".join(input().split()))
    
    for _ in range(9000):
        year += 1
        yearStr = str(year)
        if len(set(yearStr)) == len(yearStr):
            print(yearStr)
            break