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

# Take the input as integer
n = int(input())

#A Loop that runs by incrementing n by 1 until a Unique number is found

while(True):
	my_set = set()
	n += 1
	string_number = str(n)
	for i in string_number:
		my_set.add(i)
	if len(my_set) == 4:
		break


print(string_number)
	
