-er -ic bbb bbc bbe bbi bbk bbo bbr bbt bcb bcc bce bci bck bco bcr bct be- beb bec bee bei bek beo ber bet bi- bib bic bie bii bik bio bir bit bkb bkc bke bkk bko bkr bkt bob boc boe boi bok boo bor bot brb bre bri brk bro brr brt btb btc bte bti btk bto btr btt c-- cbb cbc cbe cbi cbk cbo cbr cbt ccb ccc cce cci cck cco ccr cct ce- ceb cec cee cei cek ceo cer cet ci- cib cic cie cii cik cio cir cit ckb ckc cki cko ckt co- cob coc coe coi cok coo cor cot crb crc cre cri crk cro crr crt ctb ctc cte cti ctk cto ctr ctt 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 etb etc ete eti etk eto etr ett ibb ibc ibe ibi ibk ibo ibr ibt icb icc ice ici ick ico icr ict 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 k-t kbb kbc kbe kbi kbk kbo kbr kcb kcc kce kci kck kcr kct ke- keb kec kee kei kek keo ker ket kib kic kie kii kik kio kir kit kkb kkc kke kki kkk kkr kkt kob koc koe koi kok koo kor kot krc kri krk kro krr krt ktb ktc kte ktk kto ktr ktt o-i ob- obb obc obe obi obk obo obr obt oc- ocb occ oci ock oco ocr oct oeb oec oee oei oeo oer oet oib oic oie oii oik oio oir oit okb okc oke oki okk oko okr oo- oob ooc ooi ook ooo oor oot or- orb orc ore ori ork oro orr ort ot- otb otc ote oti otk oto otr ott rbb rbc rbe rbi rbk rbo rbr rbt rcb rcc rce rci rco rcr rct re- reb rec ree rei rek reo rer ret rib ric rie rii rik rio rir rit rkb rkc rke rkk rko rkt rob roc roe roi rok roo ror rot rrb rrc rri rrk rrr rrt rtb rtc rte rti rtk rto rtr rtt tbb tbc tbe tbi tbk tbo tbr tbt tcb tcc tce tci tck tco tcr tct te- teb tec tee tei tek teo ter tet tib tic tie tii tik tio tir tit tkb tkc tke tkk tko tkr tkt to- tob toc toe toi tok too tor tot trb trc tre tri trk tro trr trt ttb ttc tte tti ttk tto ttr ttt

bbbb bbci bbeb bbet bbrc bcbc bccc bcci bcec bcer bcet bcie bcit bcor bctc bebb bebe bebi bebo beci beck beeb beek beer beet beic beik beir beit beke beki beko beo- beok beor beot berc bere beri berk bero berr bert betc bete beti beto bett bibb bibe bibi bibo bicc bice bici bick bico bieb bier biet bike biko bio- bioc bioi biot birb bire biri birk biro birr birt bitc bite bito bitt bobb bobe bobi bobo boce bock boco boec boee boeo boer boet boi- boie boii boit boke boki boko boob booc booe book boor boot bor- bore bori bork boro borr bort botb bote boti boto bott brcb brce breb brec bree brei brek breo brer bret bric brie brik brio brit brkb brob broc broe brok broo bror brot brrr brtc btcc btec btek btie btob btor btrc btrt bttb c-bo cbbc cbcc cbce cbcr cbct cbec cbee cber cbet cbir cbit cbko cbkr cbot cbre cbrt cbtc ccbc cccb cccc ccci ccee ccic ccii ccir ccob ccoc ccrc ccre ccri ccrt cctb cctc cctt cec- cece ceci ceco cect ceeb ceec ceke ceor cer- cerc cere ceri cero cert cet- cete ceti ceto cibc cibe cibi cibo cicc cici cico cicr cict ciee cier ciii ciit ciko cikr ciob cior cirb circ cire ciri cirk ciro cirr cirt citb cite citi cito citt ckbc ckbe ckbi ckck ckco cker ckob ckoc ckoi ckoo ckor ckot ckrc cktb cobb cobe cobi cobo coce cock coco coct coir coit cok- coke coko coob cook coot cor- corb corc core cori cork coro corr cort cotb cotc cote coti coto cott crbc crcc crce crcr cre- creb crec cree crei creo cret crib cric crie crik crit crkc crob croc croe crok croo cror crot crrt crtc ctbi ctec ctic ctor ctot ctrc ebbc ebbo ebbr ebcc eber ebic ebit eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecci ecco ecct ecib ecit ecko eco- ecot ecrc ecri ecrr ect- ectc ecto eeee eeke eeoc eerc eero eetc eete eick eico eiec eiei eier eike eiki eiko eire eitb eitc eiti eito eitr ekco ekeb ekek eker eket ekki ekoi eoir eore eori eotc eoto erbb erbe ercc erce ereb erec erei erer eret eric erie erik erio erit erke erki erob eroc eroe eroi eroo errc erre erro etbc etbr etcc etco etec etee eter etic etik etio etoe etok etre etro ette etti etto i-be ibec ibet ibie ibot ibrc ibri ibro ibtb ibtc icbc iccb iccc icci icco iccr icct icec icee icer icet icke icoc icor icrc icre icrr icrt iecc ieet ieie ieio iere ieri iett iiie iiii iiio iiit iioi iioo iirc iitr iitt ikee iker ikki ikko ikoo ikri iobi ioci ioee ioii ioio ioit ioke ioko iooi iooo iore iori iote ioto irbe ircc iree irer iri- iric irie irio irki irob iroc irrc irre irri irte