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
l = [str(i) for i in input()]

def _tostr(l):
	s = ''
	for i in l: s = s + str(i)
	return s

def _tolist(s):
	l = []
	for i in s: l.append(i)
	return l
	
i = int(_tostr(l))
while True:
	i = i + 1
	l = _tolist(str(i))
	if len(l)==len({*l}):
		print(int(_tostr(l)))
		break
