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
y=int(input())
y_inf=y+1


while y_inf>y:
    y_inf_list=[i for i in str(y_inf)]
    y_inf_set=set(y_inf_list)
    
    if len(y_inf_list)==len(y_inf_set):
        break
    
    y_inf=y_inf+1


print(y_inf)
