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
num = int(input())

while True :
	num += 1
	s = str(num)
	s = list(s)
	f = 0
	for i in range(4) :
		for j in range(i+1,4) :
			if s[i] == s[j] :
				f = 1
	if not f : 
		print(''.join(s))
		break
# 1512830343737
