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


x = raw_input();

j = int(x);
j += 1;
while True:
	a = [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
	val = j
	while ( val > 0 ):
		a[ val%10 ] += 1;
		val /= 10
	temp = 1
	for i in range(0,10):
		if ( a[i] > 1 ): temp = 0;
	

	if ( temp == 1 ):
		print j
		break
	j += 1;

