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
tahun = int(input())
tahun_op = tahun + 1

if tahun < 1000 or tahun > 9000 :
    exit()

stop = 0

while stop != 1 :
    array_thn = list(map(int, str(tahun_op)))
    if len(array_thn) == len(set(array_thn)) :
        jawab = tahun_op
        print(tahun_op)
        stop = 1
    else :
        tahun_op += 1