20???100 ??????? ????? ??! ??????? -20 ??? 100 ???? ???? ??? ?????? ?????????????? ????? ????? ?????? ??? ????????? ??? ??? ?????????? ?? ??? ?????? ????? user-friendly ?????? ????????! 20 ??? ????? 100 ??? ????? ??????? ??????? ????? ????? ???????? ????? ?????? ????? ??????? 20 ??? 100 : ?????? ??? ???? ?