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 find(ins):
	ins += 1
	
	test = [int(i) for i in str(ins)]
	
	inlist = []
	
	for i in test:
		if i in inlist:
			
			test = find(ins)
			break
			
		else:
			inlist.append(i)
	
	return ''.join(str(x) for x in test)
	
ins = int(input())
print(find(ins))