syntax "0" : term
syntax "'a'" : term
syntax "`a" : term
syntax "\"a" : term
syntax " 0" : term
syntax " 'a'" : term
syntax " `a" : term
syntax " \"a" : term

syntax &"0" : term
syntax &"'a'" : term
syntax &"`a" : term
syntax &"\"a" : term
syntax &" 0" : term
syntax &" 'a'" : term
syntax &" `a" : term
syntax &" \"a" : term