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
# =============================
#   Problem - 271A - Beautiful Year
#       Python3
#   Author - wdaubry
# =============================

def isdifferent(word):
    lis = []
    for el in word:

        if el in lis:
            return False
        else:
            lis.append(el)

    return True


def main():
    from sys import stdout

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

    while not isdifferent(year):
        year = str(int(year) + 1)

    print(year)

if __name__ == '__main__':
    main()
