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 isdistinct(year):
	year_instring=str(year)
	array=[each for each in year_instring]
	distinct=[]
	for each in array:
		if(not each in distinct):
			distinct.append(each)
	if(len(array)==len(distinct)):
		return True
	else:
		return False

year=int(input())
year+=1
while True:
	if(isdistinct(year)):
		break
	else:
		year+=1
		continue

print(year)