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
while True:
	try:
		class Decode:
			def __init__(self, s=""):
				self.s = s
				
			def inputt(self):
				self.s = int(input())
				
			def solve(self):
				year = self.s +1
				while len(set(str(year))) != 4:
					year += 1		
				print(year)
				
		if __name__ == "__main__":
			obj = Decode()
			obj.inputt()
			obj.solve()
			     
	except EOFError:
		break