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__':
    lower = input()

    i = str(int(lower) + 1)
    while True:
        a = i[0]
        b = i[1]
        c = i[2]
        d = i[3]
        digits = [a, b, c, d]
        unique = set(digits)

        if len(unique) == len(digits):
            break

        i = str(int(i) + 1)

    print(i)
