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
n = str(int(input())+1)
i, j, k, l = int(n[0]), int(n[1]), int(n[2]), int(n[3])
while i < 10:
    while j < 10:
        while k < 10:
            while l < 10:
                if (l not in [i, j, k]) and (k not in [i, j]) and (i != j):
                    print(i*1000+j*100+k*10+l)
                    exit()
                l += 1
            k += 1
            l = 0
        j += 1
        k = 0
    i += 1
    j = 0
