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 main():
	n=int(input())
	
	def checker(a):
		l=list(str(a))
		s=set(l)
		if len(s)==len(l):
			return 1
		return 0
		
	while 1:
		n+=1
		if checker(n):
			print(n)
			return 0
	
	return 0

if __name__ == '__main__':
	main()
