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
n = int(input())

new_n = n + 1


count = 0
while True:
	year = str(new_n)
	count = 0
	l = []
	accepted = True
	while count < len(year):
		i = year[count]
		if i not in l:
			l = l + [i]
		else:
			accepted = False
		# 	break
		count += 1
	if not accepted:
		new_n += 1
	else:
		print (new_n)
		break
