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
input_year = int(input())
i = input_year
result = 'NO'
while i <= 10000 and input_year >= 1000 and result == 'NO':
    i += 1
    str_year = str(i)
    result = 'YES'
    j = 0
    while j < len(str_year)-1 and result != 'NO':
        k = j + 1
        while k < len(str_year) and result != 'NO':
            if str_year[j] == str_year[k]:
                result = 'NO'
            k += 1
        j += 1

print(i)

