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 distinct(n):
	flag=0
	for i in range(len(n)-1):
		for j in range(i+1,len(n)):
			if n[i]==n[j]:
			#	print(n[i],n[j])
				flag=1
	return flag
n=int(input())
n=n+1
n=str(n)
n=list(n)
while distinct(n)==1:
	d="".join(n)
	d=int(d)
	d = d+1
	d=str(d)
	n=list(d)
print("".join(n))
