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
i=int(input())
while True :
	i+=1
	j=i
	hash=[False]*10
	f=False
	#print(hash)
	while j!=0 :
		r=int(j%10)
		if hash[r]==False :
			hash[r]=True
		else :
			f=True
			break
		j=int(j/10)
	#print(hash)
	if f==False:
		break
print(i)