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 beautiful(y):
	L=[]
	string=str(y)
	for i in string:
		L.append(i)
	for j in L:
		if L.count(j)!=1:
			return False
			break
	return True

if __name__=="__main__":
	n=int(input())
	m=n
	if beautiful(n):
		n+=1
		ans=n	
	while not(beautiful(n)) and m<=n:
		n+=1
		ans=n
	print(ans)