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
# encoding: utf-8

def hasOnlyDistinctDigits(year):
    year_str = str(year)
    mp = {}
    for c in year_str:
        if c in mp:
            return False
        else:
            mp[c] = None
    return True

if __name__ == '__main__':
    y = int(raw_input().rstrip()) + 1

    while True:
        if hasOnlyDistinctDigits(y):
            print y
            break
        y += 1