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
n = input()
n+=1
while(True):
	flag = 0
	a = list(str(n))
	for i in range(len(a)):
		for j in range(i+1,len(a)):
			if(a[i]==a[j]):
				flag = 1
				break
		if(flag==1):
			break
	if(flag==0):
		break
	else:
		n+=1
print n		
