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
# 271A.py
def distt(n):
	a[0]= n % 10;
	a[3]= n / 1000;
	a[2]= (n-a[3]*1000) / 100;
	a[1]= ((n-a[0])/10) % 10;
	if a[0]==a[1] or a[1]==a[2] or a[2]==a[3] or a[0]==a[2] or a[0]==a[3] or a[1]==a[3]:
		return False
	return True

a ={};
n = int(raw_input());
chk = False;
while chk==False:
	n += 1;
	chk = distt(n);
	
print n;