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.
y = int(input())
for i in range(len(str(y))-3):
    if str(y)[i] != str(y)[i+1] != str(y)[i+2] != str(y)[i+3]:
        print(y)
    else:
        y += 1
