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()
n=int(year)
n1=9000
list1=list(year)
for i in range(n1):
	year1=str(n+1+i)
	year2=list(year1)
	n2=0
	n3=len(year2)
	for x in year2:
		a=year2.count(x)
		if a==1:
			n2+=1
	if n2==n3:
		print(year1)
		break
