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
# Paulo Pacitti
# RA 185447

y = int(input())
found = False
result = y + 1

while not found:
    result_string = str(result)
    letters = set()
    for i in range(len(result_string)):
        letters.add(result_string[i])
    if len(letters) == len(result_string):
        found = True
    else:
        result += 1

print(result)
	  				 		 	  	 	 				   	  	 	