in reply to
fourth digit should not match digit "2"
See the answers you (or your cohort) got to Regex for last digit should not be "2" and adapt them. Maybe consider reading your course material, and/or perlre or perlretut.
Priority 1, Priority 2, Priority 3
Priority 1, Priority 0, Priority -1
Urgent, important, favour
Data loss, bug, enhancement
Out of scope, out of budget, out of line
Family, friends, work
Impossible, inconceivable, implemented
Results (19 votes),