20???100 ??????? ???? c? h?i ??! ??????? -20 ??? 100 ???? ?????????? ??? ?????? ??? ????? ????? ?????? ???? ?????? ??? ??? ???????? ??? ????????? ?????? ?????????? user-friendly ?????? ????????! 20 ??? ????? 100 ??? ????? ??????? ??????? ???????? ????? ???????? ????