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):
    return len(set(str(year))) == 4

def find_minimum_year_with_distinct_digits(y):
    year = y + 1
    while True:
        if has_distinct_digits(year):
            return year
        year += 1

# Input the year number
y = int(input().strip())

# Find and print the minimum year with distinct digits
minimum_year = find_minimum_year_with_distinct_digits(y)
print(minimum_year)
