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.
# Read the year
y = int(input())

# Function to check if a year has distinct digits
def has_distinct_digits(year):
    return len(set(str(year))) == 4

# Start iterating from y+1
next_year = y + 1
while not has_distinct_digits(next_year):
    next_year += 1

# Output the minimum year with distinct digits
print(next_year)
