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
def get_values():
	string = input()
	num = int(string)
	result = beauty(num )
	return print(result)
	
def beauty(m):
	dis = ''
	m = int(m) + 1
	for i in str(m):
		if i not in dis:
			dis += i
	if len(dis) != 4:
		dis = beauty(m)
	return int(dis)
get_values()



	
