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
def check_str(s):
    dct = {}
    for x in s:
        if x in dct:
            dct[x] += 1
        else:
            dct[x] = 1
    for v in dct.values():
        if v > 1:
            return False
    else:
        return True


n = int(input()) + 1
is_found = False
while not is_found:
    if check_str(str(n)):
        is_found = True
    else:
        n += 1

print(n)
