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.

Input

The single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct. It is guaranteed that the answer exists.

Examples

Input

1987


Output

2013


Input

2013


Output

2014
firstyear = input()
yr = range((firstyear+1), 9050)
for y in yr:
    sy = str(y)
    c = 0
    for d in sy:
        for d1 in sy:
            if d == d1:
                c += 1
    if (c-4) == 0:
        print sy
        break