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
n = input()
new_n = n 

def func(god):

    god = list(god)
    d = dict()
    for i in god:
        key = i
        if key not in d:
            d[key] = 0
        d[key] += 1

    if len(d.keys()) == 4:
        print(('').join(god))
        raise SystemExit

for i in range(8000):
    new_n = int(new_n)
    new_n += 1
    func(str(new_n))
    