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(raw_input())


def fun(n):
	na=list(str(n))
	len1=len(na)
	len2=len(set(na))
	if(len1==len2):
		return 1
	else:
		return 0


ans=0
while 1:
	n+=1
	if(fun(n)):
		ans=n
		break

print ans
