Provide examples of other systems which may still use analog circuits that could be redesigned to operate more efficiently using digital circuits consisting of full adders and full subtracters.

Acontact list is a place where you can store a specific contact with other associated information such as a phone number, email address, birthday, etc. write a program that first takes in word pairs that consist of a name and a phone number (both strings). that list is followed by a name, and your program should output that name's phone number.