```1. ^ - start of input
2. [a-z] - first character is a letter
3. [0-9][0-9]+ - ends with two or more numbers
4. | - or
5. [a-z]+ - has one or more letters next
6. \d* - and ends with zero or more numbers
7. $ - end of input
8. i - ignore case of input`
This might give you a hint as to what you should do. (A very broad hint)
I don’t think that regex described above quite matches the problem description. There are good pieces though.
When I did this the first time, it helped me to write two regex, one for each of the two possible patterns, and then to | the two regex.
This is the requirement that tells you what the two possible cases:
Usernames have to be at least two characters long. A two-character username can only use alphabet letters as characters.
I’d start by describing the two possible groups of usernames: Group 1 starts with _______ and has at least _____ characters while Group 2 starts with______ and has at least ______ characters