KB????? 18? KB???? ? ??? ??? ????. ??? ?? ????? ??? KB?? ??(59)? ???? ??? ??? KB???? ???????(57·??)? ?? ??. KB????? ???? ??? KB???? ??????????(57), KB???? ???? ??? KB???? ?????(55)? ????. ???(57) ???(57) KB?? ??, ??? KB???? ??(59), ??? KB??? ??(56), ??? KB???? ??(60), ??? KB?????? ??(50), ??? KB???? ??(54), ??? KB???? ??(58)? ????.