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()
n = int(s)
n = n + 1

while 1:

	s = str(n)
	n1 = s[0]
	n2 = s[1]
	n3 = s[2]
	n4 = s[3]
	
	if s[0] not in [n2,n3,n4] and s[1] not in [n1,n3,n4] and s[2] not in [n1,n2,n4] and s[3] not in [n1,n2,n3]:
		break
	n = n + 1

print(n)