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

get = input() + 1

while True:
	
	arr = [0,0,0,0,0,0,0,0,0,0]
	
	a = int(str(get)[0:1])
	b = int(str(get)[1:2])
	c = int(str(get)[2:3])
	d = int(str(get)[3:4])
	
	arr[a]+=1
	arr[b]+=1
	if arr[b]>1:
		get = get + 1
		continue
	arr[c]+=1
	if arr[c]>1:
		get = get + 1
		continue
	arr[d]+=1
	if arr[d]>1:
		get = get + 1
		continue
	break
	
print get 
	
