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 = int(input())

def are_digits_distinct(num):
    num_as_str = str(num)
    for i in range(len(num_as_str)-1):
        cur = num_as_str[i]
        for j in range(i+1, len(num_as_str)):
            if cur == num_as_str[j]:
                return False
    return True

for num in range(n + 1, 10000):
    if (are_digits_distinct(num)):
        print(num)
        break
