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=(input())
year_val=list(year)
# print(save_val)
# arr=list(year)
# arr.reverse()
# print(arr)
# i=year+1
i=(int(year)+1)
# i=str(i)
# print(arr)
while(True):
    save_val=list(str(i))
    save=set(save_val)
    if len(save)==len(year_val):
        print("".join(save_val))
        break
    i+=1