A deployment tool stores each artifact location as an absolute Unix-style path that always begins with /. The path may contain noise: repeated slashes (// counts the same as a single /), single-dot segments . (the current directory), and double-dot segments .. (the parent directory). Produce the canonical path:

• A single dot segment . is dropped.
• A double dot segment .. removes the previous real directory name, if any; at the root, .. has no effect.
• Multiple consecutive slashes collapse into one.
• The canonical path starts with a single / and, unless it is the root, never ends with a trailing /.
• The canonical form of the root itself is /.

Directory names between slashes consist of lowercase letters and digits only (a name is never literally . or .. except when it is one of those special segments).

Input format

A single line: the path. It begins with / and contains no whitespace.

Output format

A single line: the canonical path.

Constraints

• 1 <= length of the path <= 300
• The path begins with / and uses only /, lowercase letters, digits, and . characters.

/usr//local/../bin

/usr/bin

/a/./b/../../c

/c