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
def check(i):
	i = set(list(str(i)))
	if(len(i)==4):
		return 1
	return 0

a = []
for i in range(1000,10000):
	if(check(i)):
		a.append(i)

import bisect
t = int(input())
if(t in a):
	print(a[a.index(t)+1])
else:
	i = bisect.bisect_right(a,t)
	print(a[i])

