-er bbb bbe bbo bbr bbs bbt be- beb bee beo ber bes bet bjj bjr bjs bjt bob boe boj boo bor bos bot brb bre brj bro brr brs brt bsb bse bsj bso bsr bss bst btb bte bto btr bts btt ebb ebe ebj ebo ebr ebs ebt eeb eee eeo eer ees eet ejo ejt eo- eob eoe eoo eor eos eot erb ere ero err ers ert es- esb ese eso esr ess est etb ete etj eto etr ets ett jbj jbo jbr jbs jbt jeb jee jej jeo jer jes jet jjb jjj jjr jjs job joe joj joo jor jos jot jrb jro jrr jrs jrt jsb jse jsj jso jsr jss jst jtb jte jtr jts jtt ob- obb obe obj obo obr obs obt oeb oee oeo oer oes oet ojb oje ojo ojs oo- oob ooo oor oos oot or- orb ore oro orr ors ort os- osb ose osj oso osr oss ost ot- otb ote oto otr ots ott rbb rbe rbo rbr rbs rbt re- reb ree reo rer res ret rjr rob roe roj roo ror ros rot rrb rrr rrs rrt rsb rse rsj rso rsr rss rst rtb rte rtj rto rtr rts rtt sbb sbe sbj sbo sbr sbs sbt se- seb see sej seo ser ses set sjb sje sjj sjr sjs sjt sob soe soj soo sor sos sot sr- srb sre srj sro srr srs srt ss- ssb sse ssj sso ssr sss sst stb ste stj sto str sts stt tbb tbe tbj tbo tbr tbs tbt te- teb tee tej teo ter tes tet tje tjo tjr tjs to- tob toe toj too tor tos tot trb tre tro trr trs trt tsb tse tsj tso tsr tss tst ttb tte tto ttr tts ttt