1. Circle the item that does not belong in the following group: a. Dictionary b. Bookmark c. String d. Tuple

You may assume the string contains only lowercase alphabets.Reference: https://leetcode.com/problems/valid-anagram/description/"""def is_anagram(s, t):    """    :type s: str    :type t: str    :rtype: bool    """    maps = {}    mapt = {}    for i in s:        maps[i] = maps.get(i, 0) + 1    for i in t:        mapt[i] = mapt.get(i, 0) + 1    return maps == mapt

User.java User is a class that represents a user in the music player application. Every User contains a library which stores all their Playlists. A User can create Playlists or add Playlists made by other users to their library. Additionally, they can also share Playlists with other Users. Each User has the following attributes: username - Represents the username of the user The name of a user should never be null library Represents the library of the User. A list that contains all the playlists the user has created or added. Every user's library will start with a playlist called "Liked" which stores the songs that the user has liked. This playlist should have a creation Date of 0. Save for the Liked playlist, a user's library should be sorted in order of recency. That is, a more recently created playlist should appear earlier than an older one. currentPlaying Represents the song the user is currently listening to. -If it is null, then the user is not listening to any song. User should…