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()
y=n+1
m=y
a=b=c=d=0
while a==b or b==c or c==d or a==d or a==c or b==d:
	d=y%10
	y=y/10
	c=y%10
	y=y/10
	b=y%10
	y=y/10
	a=y%10
	m=m+1
	y=m
z=a*1000+b*100+c*10+d
print z

