input: 2; output: 2; expressions: `-'`-'`-' => [EM DASH]; `-'`-' => [EN DASH]; %`-' => [HYPHEN]; ``'``' => [LEFT DOUBLE QUOTATION MARK]; ``' => [LEFT SINGLE QUOTATION MARK]; `''`'' => [RIGHT DOUBLE QUOTATION MARK]; `'' => [RIGHT SINGLE QUOTATION MARK]; `,'`,' => [DOUBLE LOW-9 QUOTATION MARK]; `<'`<' => [LEFT-POINTING DOUBLE ANGLE QUOTATION MARK]; `>'`>' => [RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK];