You are given an absolute path for a Unix-style file system, which always begins with a slash ‘/’. Your task is to transform this absolute path into its simplified canonical path.

The rules of a Unix-style file system are as follows:

• A single period ‘.’ represents the current directory.
• A double period ‘..’ represents the previous/parent directory.
• Multiple consecutive slashes such as ‘//’ and ‘///’ are treated as a single slash ‘/’.
• Any sequence of periods that does not match the rules above should be treated as a valid directory or file name. For example, ‘…’ and ‘….’ are valid directory or file names.

The simplified canonical path should follow these rules:

• The path must start with a single slash ‘/’.
• Directories within the path must be separated by exactly one slash ‘/’.
• The path must not end with a slash ‘/’, unless it is the root directory.
• The path must not have any single or double periods (‘.’ and ‘..’) used to denote current or parent directories.

Return the simplified canonical path.

Example 1:

• Input: path = “/home/”
• Output: “/home”
• Explanation:
• The trailing slash should be removed.

Example 2:

• Input: path = “/home//foo/”
• Output: “/home/foo”
• Explanation:
• Multiple consecutive slashes are replaced by a single one.

Example 3:

• Input: path = “/home/user/Documents/../Pictures”
• Output: “/home/user/Pictures”
• Explanation:
• A double period “..” refers to the directory up a level (the parent directory).

Example 4:

• Input: path = “/../”
• Output: “/”
• Explanation:
• Going one level up from the root directory is not possible.

Example 5:

• Input: path = “/…/a/../b/c/../d/./”
• Output: “/…/b/d”
• Explanation:
• “…” is a valid name for a directory in this problem.

Constraints:

• 1 <= path.length <= 3000
• Path consists of English letters, digits, period ‘.’, slash ‘/’ or ‘_’.
• Path is a valid absolute Unix path.