After your interviews at Google and Microsoft, you started getting comfortable with the in- terview process and wanted to give it a try with Amazon as well. As Amazon makes more money by selling items to people, regardless of people really need those items or not, they are interested in suggesting "related" items to the query word of a user. It also happens that people make typos such that the letters are typed out of order. You are given a list of n words, which consists of words that are used in the names of items sold on Amazon. You are being asked to suggest a data structure to store these words in memory, which will efficiently suggest words that are consisting of the same letters as the query word in constant time. For example, if the user is searching for "silent", you should suggest the word "listen", among other words that are stored in your data structure. What sort of a data structure would you use? Why? Explain the advantage of using this data structure for that problem. Then, suggest a search function on the data structure you suggested above, that will efficiently offer alternative words, as explained above. Do the runtime analysis of your search function.

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Computational Systems

The computation systems can be defined as the systems that are capable of solving a problem that includes calculations either mathematical or logical, and are able to produce the result as an output. For example, a simple calculator that is given a set of numbers and operators as input and produces the result as an output can be defined as a computational system. The above example is a simple illustration only, the computational systems range from simple devices to complex devices such as the systems that control the SpaceX companies, Starlink satellites which are being quite recently seen in the skies at many places globally.