In Java! Maybe use Stringbuilder method. Please be simple as possible

Standard telephone keypads contain the digits zero through nine. The numbers two through nine each have three letters associated with them (as seen below). Many people find it difficult to memorize phone numbers, so they use the correspondence between digits and letters to develop seven-letter words that correspond to their phone numbers. For example, a person whose telephone number is 686-2377 might use this tool to develop the seven-letter word NUMBERS. 2: A B C 3: D E F 4: G H I 5: J K L 6: M N 0 7: P R S 8: T U V 9: W X Y Every seven-letter phone number corresponds to many different seven-letter words, but most of these words represent unrecognizable juxtapositions of letters. Its possible, however, that the owner of a barbershop would be pleased to know that the shops telephone number, 424-7288, corresponds to HAIRCUT. A veterinarian with the phone number 738-2273 would be pleased to know that the number corresponds to the letters PETCARE. An automotive dealership would be pleased to know that the dealership number, 639-2277, corresponds to NEWCARS. Write a program that prompts the user to enter a seven-digit telephone number as input and calculates all possible seven-letter word combinations. After sorting the result, print the first and last 10 combinations.