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 duplicates(lst):
	"""Removes Duplicates from a string or list from 0-lngth of string[set() data structure could also be used other than this]"""
	lst = list(str(lst))
	n = len(lst)-1
	i = 0
	while i<n:
		if lst[i] in lst[i+1:]:
			del lst[i]
			n-=1
		i+=1
	return lst

n = input()
n0 = int(n)+1
while len(duplicates(n0))<4:
	n0+=1
print(n0)