-er -ic bbb bbc bbe bbi bbk bbo bbr bbt bcb bcc bce bci bck bco bcr bct bcz be- beb bec bee bei bek beo ber bet bez bi- bib bic bie bii bik bio bir bit biz bkb bkc bke bkk bko bkr bkt bob boc boe boi bok boo bor bot boz brb bre bri brk bro brr brt brz btb btc bte bti btk bto btr btt btz bze bzo bzr bzz c-- cbb cbc cbe cbi cbk cbo cbr cbt cbz ccb ccc cce cci cck cco ccr cct ccz ce- ceb cec cee cei cek ceo cer cet cez ci- cib cic cie cii cik cio cir cit ckb ckc cki cko ckt co- cob coc coe coi cok coo cor cot coz crb crc cre cri crk cro crr crt crz ctb ctc cte cti ctk cto ctr ctt ctz cz- czc cze czk czo czt ebb ebc ebe ebi ebk ebo ebr ebt ec- ecb ecc ece eci eck eco ecr ect eeb eec eee eek eeo eer eet eib eic eie eii eik eio eir eit ekb ekc eke eki eko ekr ekt eo- eob eoc eoe eoi eok eoo eor eot erb erc ere eri erk ero err ert erz etb etc ete eti etk eto etr ett etz eze ezo ezr ezz ibb ibc ibe ibi ibk ibo ibr ibt ibz icb icc ice ici ick ico icr ict icz ie- iec iee iei iek ier iet iib iic iie iii iio iir iit ikb ikc ike iki ikk iko ikr ikt io- iob ioc ioe ioi ioo ior iot ir- irb irc ire iri irk iro irr irt itb itc ite iti itk ito itt itz ize izi izo izz k-t k-z kbb kbc kbe kbi kbk kbo kbr kbz kcb kcc kce kci kck kcr kct ke- keb kec kee kei kek keo ker ket kez kib kic kie kii kik kio kir kit kiz kkb kkc kke kki kkk kkr kkt kob koc koe koi kok koo kor kot koz krc kri krk kro krr krt ktb ktc kte ktk kto ktr ktt kzo o-i ob- obb obc obe obi obk obo obr obt oc- ocb occ oci ock oco ocr oct ocz oeb oec oee oei oeo oer oet oib oic oie oii oik oio oir oit oiz okb okc oke oki okk oko okr oo- oob ooc ooi ook ooo oor oot or- orb orc ore ori ork oro orr ort orz ot- otb otc ote oti otk oto otr ott otz oze ozo ozt ozz rbb rbc rbe rbi rbk rbo rbr rbt rcb rcc rce rci rco rcr rct re- reb rec ree rei rek reo rer ret rez rib ric rie rii rik rio rir rit riz rkb rkc rke rkk rko rkt rkz rob roc roe roi rok roo ror rot roz rrb rrc rri rrk rrr rrt rtb rtc rte rti rtk rto rtr rtt rtz rzb rze rzo tbb tbc tbe tbi tbk tbo tbr tbt tbz tcb tcc tce tci tck tco tcr tct te- teb tec tee tei tek teo ter tet tez tib tic tie tii tik tio tir tit tiz tkb tkc tke tkk tko tkr tkt tkz to- tob toc toe toi tok too tor tot toz trb trc tre tri trk tro trr trt trz ttb ttc tte tti ttk tto ttr ttt tze zbb zbc zbr zbt zce zco zeb zec zee zek zeo zer zet zez zib zie zik zio zir zit ziz zo- zob zoc zoe zoi zok zoo zor zot zro zte ztr zzr zzt zzz