,5L>G$ ,P>5!SES ,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