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
i = int(input())
flag = 0
i+=1
while (flag==0):
	s = str(i)
	a = s.count(s[0])
	b = s.count(s[1])
	c = s.count(s[2])
	d = s.count(s[3])
	#print ('a',a,' ','b',b,' ','c',c,' ','d',d)
	if (a==b==c==d==1):
		flag = 1
	else:
		i+=1
print (i)