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 = int(input())
done = False
for x in range(year//1000,10):
    for y in range(10):
        for z in range(10):
            for a in range(10):
                if not done and x != y and x != z and x !=a:
                    if y != z and y != a:
                        if z != a:
                            if 1000*x + 100*y + 10*z + a > year:
                                print(1000*x + 100*y + 10*z + a)
                                done = True