-er bbb bbe bbk bbo bbr bbt be- beb bee bek beo ber bet bjj bjk bjr bjt bkb bke bkk bko bkr bkt bob boe boj bok boo bor bot brb bre brj brk bro brr brt btb bte btk bto btr btt ebb ebe ebj ebk ebo ebr ebt eeb eee eek eeo eer eet ejo ejt ekb eke eko ekr ekt eo- eob eoe eok eoo eor eot erb ere erk ero err ert etb ete etj etk eto etr ett jbj jbk jbo jbr jbt jeb jee jej jek jeo jer jet jjb jjj jjk jjr jkb jkk jko jkr jkt job joe joj jok joo jor jot jrb jrk jro jrr jrt jtb jte jtk jtr jtt k-t kbb kbe kbk kbo kbr ke- keb kee kek keo ker ket kjb kje kjr kkb kke kkk kkr kkt kob koe kok koo kor kot krk kro krr krt ktb kte ktj ktk kto ktr ktt ob- obb obe obj obk obo obr obt oeb oee oeo oer oet ojb oje ojo okb oke okj okk oko okr oo- oob ook ooo oor oot or- orb ore ork oro orr ort ot- otb ote otk oto otr ott rbb rbe rbk rbo rbr rbt re- reb ree rek reo rer ret rjk rjr rkb rke rkk rko rkt rob roe roj rok roo ror rot rrb rrk rrr rrt rtb rte rtj rtk rto rtr rtt tbb tbe tbj tbk tbo tbr tbt te- teb tee tej tek teo ter tet tje tjo tjr tkb tke tkk tko tkr tkt to- tob toe toj tok too tor tot trb tre trk tro trr trt ttb tte ttk tto ttr ttt