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 = input()
l = int(s)
l = l+1
s = str(l)
mul = 1
x = 2
while(x!=1) :
	mul = 1
	for i in range(len(s)):
		c = s.count(s[i])
		mul = mul*c
		#print("mul: ",mul)
	if(mul==1):
		x=1
	l = l+1
	s = str(l)
	#print(s)

print(l-1)