The regular expression tester can be found at <a href=https://regex101.com/>https://regex101.com/</a>.
<pre>


<hr>
Good Social Security Numbers
333-22-9814
123-45-6789
965-09-1524

Bad Social Security Numbers
12-345-6789
098-76-543
1x2-34-9876
<hr>
Good Three Letter Acronyms
IBM
CIA
FBI
NMU


Bad Three letter Acronyms
MTECH
UofI
ID
NASA
<hr>
Good Phone Numbers
213-5512
613-4577
902-2211

Bad Phone Numbers
21-444
312-44321
12-34-21
5672145



<hr>
Good passwords
(The rule is at least five letters, followed by at least one digit)
freds99
twelve12
wilma21
betsy6

Bad passwords
a
ab
cab
12de
a2
g53
aaaaffffgggggg
3334567

<hr>
Good usernames
(start with a lower case letter.  Then lower case letter or digit or underscore.)
rappleto
apoe
mkowalczyk
snoop2luv

Bad usernames
Randy Appleton
Mkowalczyk
2luvIsSnooping

<hr>
Good Date
(Hint: the stuff before the first / is either a digit or an 10 or an 11 or a 12)
1/2/03
9/13/2004
10/01/1993

Bad Date
13/1/03
11/004/1573
11/9 03

<hr>
Good Email Addresses
apoe@nmu.edu
andy.poe@nmu.edu
andy1234@bbc.co.uk
AndyPoe@www.gmail.com

Bad email addresses
apoe.nmu.edu
andy@poe@nmu.edu
andy 1234 @bbc.co.uk
andyPoe@nmu

<hr>

Good URLs
http://euclid.nmu.edu
http://hockey.mtu.stinks.com/
https://www.cheese.com/ilovecheese.html
http://gmail.com/folder/inbox
http://fredfredburger.com/~bpeterso

Bad URLs
htt://turing.nmu.edu
http:///~apoe
http://steven@barney.com

<hr>

Good People's Names
Steve Smith
Dale G. Everrt
W. H. Smith
Kale McCall
Kyle Dudness

Bad People's Names
Ste.ve Smith
dAle G. Evertt
W. H Smith
JoHn Johnson
Calison

<hr>
Good Phone numbers:
906 225 1983
(312)555-1234
(312) 864-9810
226-8131
314-8532

Bad Phone Numbers
9x1 225 6429
(312) 551 131
(310 653-0913
(98) 762-0945
312-874
906 225 12345