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

s = input()
i=0
s = int(s)+1
s = str(s)
while(i<1000):
	for i in range(4):
		e = s.count(s[0])
		f = s.count(s[1])
		g = s.count(s[2])
		h = s.count(s[3])
	if e>=2 or f>=2 or g>=2 or h>=2:
		s = int(s)+1
		s = str(s) 
	else:
		break


print(s)
