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
#https://codeforces.com/problemset/problem/271/A

def freq(string):
	h = {}
	for x in string:
		if x in h:
			h[x]+=1
		else:
			h[x] = 1
	return h
	
def is_distinct(y):
	h = freq(str(y))
	aa = lambda x:x==1
	return all(map(aa,[h[x] for x in h]))
y = int(input())
y+=1
while(not is_distinct(y)):
	y+=1
	
print(y)