? C???E ????E ????E ??C E?E? E? ?? ??C?? ??C E??? ??? C??C? ?? ???CE ?I?C?? ???? ???? C???CE??? C??I???? EC???C? ??C ???E ??C?? E?? C???C?? C??I??E C?E? ?????C C???O? ?E?E C???CE ????E ???E? ???ECI ??C? ???? ?C?E EIE ??? ???O C???IC? ?? C???? C??C??? ??? E??? ?? ?? ??E ?E?I ?? ?C??E:

??? C ?EU??C ?U?? C???? ??I?????U?? ... ???E?U? C???? ?UOC?C E?? ?I???

?U???U???C IU???C ????U?C? ?IC?????C ... ??UECI??C ?????? ????C E?? E????? (1)

??I ?I? E?? C?O??C? E??I??? ??I?E?? ??? C?EECE ??EC?E C???O ?? C???C?? C???EE? ?EE?I??? C??I?C? ?? ??CI?? ?????? ?? ?? AI???