1  Regexp: a{2,3}
 2  a: Fail
 3  aa: Ok
 4  aaa: Ok
 5  aaaa: Fail
 6  Regexp: ba{2,3}c
 7  bac: Fail
 8  baac: Ok
 9  baaac: Ok
10  baaaac: Fail
11  Regexp: a(b|c){2,3}d
12  abcd: Ok
13  acccd: Ok
14  abd: Fail
15  accccd: Fail