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
if __name__ == '__main__':
    numb = int(input())
    result = ""
    for i in range(numb+1, 10000):
        list1 = list(str(i))
        list2 = set(list1)
        if len(list1) == len(list2):
            for i in list1:
                result += str(i)
            break
    result = int(result)
    print(result)
