My professor wants this: Write a Java program that prompts the user to enter a security code that matches a specific pattern. Your program must approve the user's entry. The pattern consists of these characters in this sequence: A lower case character, two upper case characters, two or three digits, two lower case characters, an upper case character, 2 or 3 lower case characters, 2 digits. They want me to use Appendix H, with the .matches method. Which I'm having a hard time understanding in my book.

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