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
s = input().strip()
n = int(s) + 1
s = str(n)
fl = True
while (fl):
    fl = False 
    s = str(n)
    p = int(1000)
    a = []
    for x in s:
        if (x in a):
            n += p
            n = (n//p) * p
            fl = True 
            break
        else:
            a.append(x)
        p //= 10
print(n)

