lex
	ignore /space+/
	literal `* `( `)
	token id /[a-zA-Z_]+/ 
		{
			t: str = input->pull( match_length )
			input->push( make_token( typeid<id>, t ) )
		}
end

def foo [id]

def item 
	[id]
|	[foo]
|	[`( item* `)]

def start 
	[item*]

parse Input: start[ stdin ]
print[ @Input ]

##### IN #####
a b ( c d ) e f
##### EXP #####
a b ( c d ) e f