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
y = input()
y = int(y)

d = []
for x in range(1000,10000):
	if len(set(str(x))) == len(str(x)):
		d.append(x)
n = len(d)

if y in d:
	print(d[d.index(y)+1])
else:
	i = 0
	while i < n and y > d[i]:
		i+=1
	print(d[i])