-er -ic b-p bbb bbc bbe bbi bbo bbp bbr bbt bcb bcc bce bci bco bcp bcr bct be- beb bec bee bei beo bep ber bet bi- bib bic bie bii bio bip bir bit bob boc boe boi boo bop bor bot bpb bpc bpe bpi bpo bpp bpr bpt brb bre bri bro brp brr brt btb btc bte bti bto btp btr btt c-- cbb cbc cbe cbi cbo cbp cbr cbt ccb ccc cce cci cco ccp ccr cct ce- ceb cec cee cei ceo cep cer cet ci- cib cic cie cii cio cip cir cit co- cob coc coe coi coo cop cor cot cpb cpc cpe cpi cpo cpp cpr cpt crb crc cre cri cro crp crr crt ctb ctc cte cti cto ctp ctr ctt ebb ebc ebe ebi ebo ebp ebr ebt ec- ecb ecc ece eci eco ecr ect eeb eec eee eeo eep eer eet eib eic eie eii eio eip eir eit eo- eob eoc eoe eoi eoo eop eor eot ep- epb epc epe epi epo epp epr ept erb erc ere eri ero erp err ert etb etc ete eti eto etp etr ett ibb ibc ibe ibi ibo ibp ibr ibt icb icc ice ici ico icp icr ict ie- iec iee iei iep ier iet iib iic iie iii iio iip iir iit io- iob ioc ioe ioi ioo iop ior iot ipb ipc ipe ipi ipo ipp ipr ipt ir- irb irc ire iri iro irp irr irt itb itc ite iti ito itp itt o-i ob- obb obc obe obi obo obp obr obt oc- ocb occ oci oco ocp ocr oct oeb oec oee oei oeo oep oer oet oib oic oie oii oio oip oir oit oo- oob ooc ooi ooo oop oor oot op- opb opc ope opi opo opp opr opt or- orb orc ore ori oro orp orr ort ot- otb otc ote oti oto otp otr ott p-p pbb pbc pbe pbi pbo pbp pbr pbt pcb pcc pce pci pco pcp pcr pct peb pec pee pei peo pep per pet pib pic pie pii pio pip pir pit pob poc poe poi poo pop por pot ppb ppc ppe ppi ppo ppp ppr ppt prb prc pre pri pro prp prr prt pt- ptb ptc pte pti pto ptp ptr ptt rbb rbc rbe rbi rbo rbp rbr rbt rcb rcc rce rci rco rcp rcr rct re- reb rec ree rei reo rep rer ret rib ric rie rii rio rip rir rit rob roc roe roi roo rop ror rot rpb rpc rpe rpi rpo rpp rpr rpt rrb rrc rri rrp rrr rrt rtb rtc rte rti rto rtp rtr rtt tbb tbc tbe tbi tbo tbp tbr tbt tcb tcc tce tci tco tcp tcr tct te- teb tec tee tei teo tep ter tet tib tic tie tii tio tip tir tit to- tob toc toe toi too top tor tot tpb tpc tpe tpi tpo tpp tpr tpt trb trc tre tri tro trp trr trt ttb ttc tte tti tto ttp ttr ttt

bbbb bbci bbeb bbet bbpr bbrc bcbc bcbp bccc bcci bcec bcer bcet bcie bcit bcor bcpp bctc bebb bebe bebi bebo beci beeb beep beer beet beic beir beit beo- beor beot bepo berc bere beri bero berr bert betc bete beti beto bett bibb bibe bibi bibo bicc bice bici bico bieb bier biet bio- bioc bioi biot bipp birb bire biri biro birr birt bitc bite bito bitt bobb bobe bobi bobo boce boco boec boee boeo boep boer boet boi- boie boii boit boob booc booe boop boor boot bope bopp bor- bore bori boro borr bort botb bote boti boto bott bpcp bpoe bpot bprc bpti brcb brce breb brec bree brei breo brep brer bret bric brie brio brit brob broc broe broo bror brot brrr brtc btbp btcc btec btie btob btor btrc btrt bttb c-bo cbbc cbcc cbce cbcp cbcr cbct cbec cbee cber cbet cbir cbit cbot cbpc cbpp cbre cbrt cbtc ccbc cccb cccc ccci cccp ccee ccic ccii ccip ccir ccob ccoc ccpe ccpp ccpr ccrc ccre ccri ccrp ccrt cctb cctc cctt cebp cec- cece ceci ceco cecp cect ceeb ceec ceip ceop ceor cepc cepe cepo cepp cepr cept cer- cerc cere ceri cero cerp cert cet- cete ceti ceto cetp cibc cibe cibi cibo cicc cici cico cicr cict ciee cier ciii ciit ciob cior cipo cipp cirb circ cire ciri ciro cirr cirt citb cite citi cito citp citt cobb cobe cobi cobo coce coco cocp coct coep coip coir coit coob coop coot cope copi copo copp copr copt cor- corb corc core cori coro corp corr cort cotb cotc cote coti coto cott cpbc cpce cpeb cpep cper cpic cpio cpre cpri cprt cptp cptr crbc crcc crce crcr cre- creb crec cree crei creo crep cret crib cric crie crip crit crob croc croe croo crop cror crot crpc crrt crtc crtp ctbi ctcp ctec ctep ctic ctor ctot ctpo ctpp ctrc ctrp ebbc ebbo ebbr ebcc eber ebic ebit eboe eboo ebor ebpo ebro ecbc ecbe eccb eccc ecce ecci ecco ecct ecib ecip ecit eco- ecop ecot ecpp ecrc ecri ecrr ect- ectc ecto eeee eeoc eerc eero eetc eete eico eiec eiei eier eipo eipr eire eitb eitc eiti eito eitr eoir eore eori eotc eoto epcc epci epec epee eper epi- epic epie epip epit epoc epor epot eppc eppo eppp eprb epro eprp epte erbb erbe ercc erce ercp ereb erec erei erer eret eric erie erio erit erob eroc eroe eroi eroo erpe errc erre erro etbc etbr etcc etco etec etee eter etic etio etoe etre etro ette etti etto i-be ibec ibet ibie ibot ibrc ibri ibro ibtb ibtc icbc icbp iccb iccc icci icco iccp iccr icct icec icee icer icet icoc icor icpc