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