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
year = int(input())
def check(y):
	if len(str(y)) == len(set(str(y))):
		return 1
	return 0

def main():
	next_year = year + 1
	while(1):
		if check(next_year):
			print (next_year)
			break
		else:
			next_year += 1

if __name__ == "__main__" and year >= 1000 and year <= 9000:
	main()
