'^a' => ["begin of line", 'pm'],
'^b' => ["char back$sign{_}w$sign{_}ard$sign{_}s", 'pm'],
'+b' => ["word back$sign{_}w$sign{_}ard$sign{_}s", 'pm'],
'^a' => ["begin of line", 'pm'],
'^b' => ["char back$sign{_}w$sign{_}ard$sign{_}s", 'pm'],
'+b' => ["word back$sign{_}w$sign{_}ard$sign{_}s", 'pm'],