opening delimiters x (1 x [2 x {3 x =4 x $5 x £6 x ¥7 x ¡8 x ¿9 x «10 closing delimiters 1, x 2. x 3; x 4! x 5? x 6% x 7¢ x 8» x 9) x 10] x 11} x opening/closing delimiters x`1`x'2'x"3"x:4:x 5 x 6 x 7 x 8 x 9 x 10 x override opening/closing delimiters x ( 1 ) x 2 , x 3 :x: 4 spacing 0 1 2 3 0123 0123 expressions 9 6 28 0 7 1 2