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 = int(raw_input())
def sat(x):
    x = str(x)
    if x[0] in x[1:] or x[1] in x[0] + x[2:] or x[2] in x[0:2] + x[3] or x[3] in x[0:3]:
        return False
    return True
n += 1
while not sat(n): n += 1
print n