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
# your code goes here

def isUnique(year):
	D=dict();
	hashList=list()
	while(year>0):
		dig=(year%10)
		if(dig not in hashList):
			hashList.append(dig)
		else:
			break
		year=(year//10)
	if(year==0):
		return True
	else:
		return False


year=int(input())
check=False
while (True):
	year=year+1
	if(isUnique(year)):
		break;
print(year)

		
