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 split_num (n):
	out = []
	while n > 0:
		r = n % 10
		out.append(r)
		n //= 10
	return out

def is_all_disctinct (y):
	return len(set(split_num(y))) == 4

year = int(input())

for y in range(year + 1, 9223372036854775807):
	if (is_all_disctinct(y)):
		print (y)
		break