Syntax: .
[]
['a']
[]
['a']
[]
['ba']

Syntax: ^
['']
[]
[]
['a']
[]
[]

Syntax: $
['']
[]
['a']
[]
[]
['a']

Syntax: *
['']
['a']
['ab']
['abbbbb']
['a']
[]

Syntax: +
[]
[]
['ab']
['abbbbb']
[]
[]

Syntax: ?
['']
['a']
['ab']
['ab']
['a']
[]

Syntax: *?
['', '']
['a']
['a']
[]

Syntax: +?
['a']
['ab']
[]
[]

Syntax: ??
['', '']
['a']
['a']
[]

Syntax: {m}
[]
['aa']
['aa']

Syntax: {m,n}
[]
['ab']
['aab']
['aab']
['b']
['ab']
['aab']
['aab']
[]
[]
['aab']
['aaab']
['aaaaa', 'aaaaa']
['aaaaa', 'aaaaa', '']
['aaaaaaaaaa']

Syntax: {m,n}?
[]
['ab']
['aab']
['aab']
['b']
['ab']
['aab']
['aab']
[]
[]
['aab']
['aaab']
['aaa', 'aaa', 'aaa']
['', '', '', '', '', '', '', '', '', '', '']
['aaa', 'aaa', 'aaa']

Syntax: []
['a', 'b', 'c']
['b', 'c']
[]
['a']
['*']

Syntax: |
['']
['']
['b', 'a']
['h', 'ello']

Syntax: (...)
['bbbb', '', '']

Syntax: (?...)
['bbbb', '', '']
[]
['a']
['a']
[]