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
s = str(int(input())+1)
col = set()
flag=False
while flag==False:
	i=opn=0
	while i<4:
		if s[i] in col:
			opn = opn + int(s[i])*(10**(3-i)) + 10**(3-i)
			s=str(opn)
			col.clear()
			break
		else:
			opn = opn + int(s[i])*(10**(3-i))
			col.add(s[i])
		i+=1
		if i==4:
			flag=True
print(s)