Regex pattern is not correct

Question

I have the following regex to match this:
U$MichaelU$P@$asdqwe123P@$ - this is correct; the other two are not
U$NameU$P@$PasswordP@$
U$UserU$P@$ad2P@$

A registration is valid when:

• The username is surrounded by "U$"
• The username needs to be minimum 3 characters long, start with an uppercase letter, followed only by lowercase letters
• The password is surrounded by "P@$"
• The password needs to start with minimum 5 alphabetical letters (not including digits) and must end with a digit

My regex is

@"^(U\S)([A-z][a-z]{3,})\1(P@\S)([a-z]{5,}[^\d])([\d]+)\3$"

The problem is that it matches the first one but when I submit to the judge it passes first 2 test but the rest it breaks, could you please tell me where is my mistake.

Answer 1

Hello your regex must be

@"^(U\S)([A-Za-z]{3,})\1(P@\S)([A-Za-z0-9]{5,})\3$"

it works for you