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
s1 = raw_input()

int_s1 = int(s1)

for year in range(int_s1+1, 10001):
    str_year = str(year)
    if str_year[0] != str_year[1]:
        if str_year[0] != str_year[2] and str_year[1] != str_year[2]:
            if str_year[0] != str_year[3] and str_year[1] != str_year[3] and str_year[2] != str_year[3]:
                print(str_year)
                break

