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
first_year = input()
next_year = int(first_year)
num = 0
while True:
    next_year += 1
    for i in range(4):
        next_year = str(next_year)
        if first_year[i] == next_year[i]:
            break
        else:
            num += 1
    if len(set(next_year)) == 4:
        print(next_year)
        break
    else:
        num = 0
        next_year = int(next_year)