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
a=int(input())
ls=[1000*i+100*j+10*k+l for i in range(1,9) for j in range(0,10) for k in range(0,10) for l in range(0,10) if i!=j and i!=k and i!=l and j!=k and j!=l and k!=l]
ls.append(9012)
for i in ls:
    if i>a:
        print(i)
        break