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 get_next_year(yr):
	nxt_yr = int(yr)
	c = 0
	while c < len(yr):
		nxt_yr = nxt_yr + 1
		nxt_yr_dgts = set()
		for i in str(nxt_yr):
			nxt_yr_dgts.add(i)
		c = len(nxt_yr_dgts)
	return nxt_yr



if __name__ == '__main__':
	print(get_next_year(input().strip(" ")))