,5L>G$ ,BRACKETS ,EXAMPLES

#1_4 ,TWO 0TWO MATRIX F/ R[ "O
  Z]O SECOND R[ Z]O "O IS WRITT5

  @,(#1 #0@,)
  @,(#0 #1@,)

#2_4 ,TWO 0?REE MATRIX F/ R[ A
  ;B ;C SECOND R[ ;D ;E ;F IS
  WRITT5

  @,(A B C@,)
  @,(D E F@,)










                              #A