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
z=input()
z=str(int(z)+1)
k=1
while k==1:
	flag=0
	w=[]
	for i in z:
		if i in w:
			z=str(int(z)+1)
			flag=1
			break
		w.append(i)
	if flag==0:
		k=0
		break
	#print(z)
print(z)