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
inYearStr = input()
inYear = int(inYearStr)

def isDistinct(year):
	digit = list(str(year))
	digit.sort()
	if digit[0]!=digit[1] and \
	   digit[1]!=digit[2] and \
	   digit[2]!=digit[3] :
		return True
	else:
		return False

year = inYear+1		
while not isDistinct(year):
	year = year+1

print(year)