1 Regexp: (a|b{0,3}){0,1} 2 a: Ok 3 aa: Fail 4 b: Ok 5 bb: Ok 6 bbb: Ok 7 bbbb: Fail 8 ab: Fail 9 ba: Fail 10 Regexp: ([0-9]{0,3}|([0-9]{0}|[0-9]{0,3})){0,3} 11 0: Ok 12 00: Ok 13 123: Ok 14 abc: Fail 15
