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
year_intr=input()
year_intr=int(year_intr)
year_distinct=year_intr

while True:
    ok = True
    year_distinct+=1
    year_distinct=str(year_distinct)
    empty=''
    for piece in year_distinct:
        if len(empty)>0:
            #check if the new addition is on the empty
            if piece in empty:
                ok=False
        empty = empty + piece
    if ok:
        break
    year_distinct=int(year_distinct)

print(year_distinct)