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
#!/usr/bin/env python
num_str = raw_input()
num = int(num_str)
is_found = False
while is_found == False:
	num += 1
	len_num = len(str(num))
	after_set = len(set([int(x) for x in str(num)]))
	if len_num == after_set:
		print num
		is_found = True
	

