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
def mods(a, x):
    a.append(x % 10)
    x //= 10
    return x


def func(n):
    global flag
    m, x, a = 0, n, []
    for i in range(4):
        x = mods(a, x)
    for i in a:
        if a.count(i) >= 2:
            break
        else:
            m += 1
    if m == 4:
        flag = False
        return n
    n += 1
    return n


n, flag = int(input()), True
x = n + 1
while flag:
    x = func(x)
print(x)
