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=input()
arr=[]
x=n
while x>0:
	arr.append(x%10)
	x=x/10
for i in range(n+1,10000):
	flag=0
	y=i
	ar=[]
	while y>0:
		if y%10 in ar:
			flag=1
			break
		ar.append(y%10)
		y=y/10
	if flag==0:
		print i
		break
	else:
		continue
#1987---->2013