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
o = str(input())
x = int(o)
y = int(o)
i = 0
x_digits = [0 for u in range(len(o))]
ok = True
while True:
    x += 1
    tmp = x
    i = 0
    ok = True
    while tmp != 0:
        x_digits[i] = tmp % 10
        tmp //= 10
        i += 1
    for k in range(len(x_digits)):
        for j in range(k + 1, len(x_digits)):
            if x_digits[k] == x_digits[j]:
                ok = False
                break
        if not ok:
            break
    if ok and x > y:
        print(x)
        break

























