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 notEqual(s):
	counts = {}
	for i in s:
		counts[i] = counts.setdefault(i, 0)+1
	for x in counts.values():
		if(x >=2):
			return True
	return False

year = input()
year = str(int(year)+1)
while notEqual(year):
	year = str(int(year)+1)
print(year)