Registration workers at a conference for authors

Registration workers at a conference for authors of children’s books have collected data about conference participants, including the number of books each author has written and the target age of their readers. The participants have written from 1 to 40 books each, and target readers’ ages range from 0 through 16. Design a program that continuously accepts the number of books written until a sentinel value is entered, and then displays a list of how many participants have written each number of books (1 through 40). I need help doing this in pseudocode