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
s = str(input())
y = int(s)
while True:
	y += 1
	d = []
	is_unique = True
	for yy in str(y):
		is_in = False
		for dd in d:
			if yy == dd:
				is_in = True
				break
		if is_in:
			is_unique = False
			break
		else:
			d += [yy]
	if is_unique:
		print(y)
		break
