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

def notDistinct(year):
	year = str(year)
	x = [0]*10
	for i in year:
		if x[int(i)] == 0:
			x[int(i)] = 1
		else:
			return True
	return False

if __name__ == '__main__':
	year = int(raw_input())
	year += 1
	while(notDistinct(year)):
		year += 1
	print year
