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
n = int(raw_input())
flag = True
number = 0
i = n + 1
while True:
	for j in range(4):
		for k in range(j+1,4):
			if str(i)[j] == str(i)[k]:
				flag = False
				break
		if flag == False:
			break
	if flag == False:
		flag = True
		i += 1
		continue
	else:
		number = i
		break
print number
				