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
"""
Nome: Stefano Lopes Chiavegatto
RA: 1777224
"""

y = int(input());
y = y + 1;

while (y <= 9012):
	nums = {}
	sy = str(y)
	i = 0

	if (sy[0] == sy[1] or sy[0] == sy[2] or sy[0] == sy[3] or sy[1] == sy[2] or sy[1] == sy[3] or sy[2] == sy[3]):
		y = y + 1
	else:
		print(y)
		break
		 	 		    		  			 	   	 		  		