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 = input()
int_year = int(year) +1
str_year = str(int_year)
def is_distinct(y):
	l = ""
	for i in y:
		if i not in l :
			l+=i
	return l == y
while not is_distinct(str_year):
	int_year += 1
	str_year = str(int_year)
print(str_year)