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 isDistinct(yearInput):
	for firstDigit in yearInput:
		count = 0
		for secondDigit in yearInput:
			if secondDigit == firstDigit:
				count += 1
			if count > 1:
				return False
	return True

yearInput = raw_input()
notFound = True
intYear = int(yearInput)
while notFound:
	intYear += 1
	stringYear = str(intYear)
	if isDistinct(stringYear):
		notFound = False
print intYear
