A warehouse logging system stores every cargo manifest node as a single JSON value. A node is either a leaf (a number, a string, a boolean, or null), a list node (a JSON array of sub-manifests), or a map node (a JSON object whose keys name compartments and whose values are sub-manifests).

You are given exactly one manifest node. Determine whether it is directly empty: a map node with zero keys, or a list node with zero elements. A leaf is never considered empty. A map or list node that holds at least one key or element is not empty, even if every value nested inside it is itself empty — only the outermost node's own key/element count matters.

Input format

A single line containing one syntactically valid JSON value. The value may contain nested objects, arrays, strings, numbers, booleans, and null, and may include arbitrary spaces immediately inside brackets or around punctuation (e.g. { } or [ 1, 2 ]).

Output format

Print true if the given node is directly an empty object or an empty array; otherwise print false.

Constraints

• The line is between 1 and 2000 characters long.
• The JSON value nests to a depth of at most 50.
• Any string inside the JSON contains only printable ASCII characters and standard JSON escapes; the line itself contains no raw (unescaped) newline.

{}

true

{"a": {}, "b": [1,2,3]}

false