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
line = input()
year = int(line)
year += 1


def is_distinct(str_year):
    for i in range(len(str_year)-1):
        if len([j for j, letter in enumerate(str_year) if letter == str_year[i]]) > 1:
            return False
    return True


while True:
    if is_distinct(str(year)):
        print(str(year))
        break
    else:
        year += 1
