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
year=int(input())
a=""
for i in range(year+1,9013):
    i=list(str(i))
    if (i[0] == i[1] or i[0]==i[2]or i[0] ==i[3] or i[1] ==i[2] or i[1] ==i[3] or i[2] == i[3] ):
        continue
    else:
        for j in i:
            a=a+j
        print(a)
        break
