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 = str(input())
year = int(s)
digits = [s[0], s[1], s[2], s[3]]

while True:
	year += 1
	syear = str(year)
	digits[0] = syear[0]
	digits[1] = syear[1]
	digits[2] = syear[2]
	digits[3] = syear[3]
	if digits[0] != digits[1] and digits[0] != digits[2] and digits[0] != digits[3] and digits[1] != digits[2] and digits[1] != digits[3] and digits[2] != digits[3]:
		print(year)
		break