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