1 Regexp: ((a|b|\p{Nd}){1,2}|aaa|bbbb){1,2} 2 bab: Ok 3 aaca: Fail 4 aaabbbb: Ok 5 a0b: Ok 6 aa0aaa: Fail 7 b0aaa: Ok 8 Regexp: (\d{1,3}\.){3}\d{1,3} 9 1.2.3.4: Ok 10 1.22.333.44: Ok 11 1.2.3: Fail 12 1..2.3: Fail 13
