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
r = int(raw_input())

while True:
    r = r+1
    lists = list(str(r))
    length = len(lists)
    lists.sort()
    a = 0
    for i in range(0,length-1):
        if lists[i]==lists[i+1]:
            a  = a +1
    if a ==0:
        print r
        exit(0)