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 has_distinct_digits(year):
    year_str = str(year)
    return len(set(year_str)) == len(year_str)

def find_next_distinct_year(y):
    y += 1  # Increment the year to start searching from the next one
    while not has_distinct_digits(y):
        y += 1
    return y

if __name__ == "__main__":
    y = int(input())
    next_distinct_year = find_next_distinct_year(y)
    print(next_distinct_year)