-er -ic b-p bbb bbc bbe bbi bbm bbo bbp bbr bbt bcb bcc bce bci bcm bco bcp bcr bct be- beb bec bee bei bem beo bep ber bet bi- bib bic bie bii bim bio bip bir bit bmb bmc bme bmi bmm bmo bmp bmr bmt bob boc boe boi bom boo bop bor bot bpb bpc bpe bpi bpm bpo bpp bpr bpt brb bre bri brm bro brp brr brt btb btc bte bti btm bto btp btr btt c-- cbb cbc cbe cbi cbm cbo cbp cbr cbt ccb ccc cce cci ccm cco ccp ccr cct ce- ceb cec cee cei cem ceo cep cer cet ci- cib cic cie cii cim cio cip cir cit cmb cmc cme cmi cmm cmo cmp cmr cmt co- cob coc coe coi com coo cop cor cot cpb cpc cpe cpi cpm cpo cpp cpr cpt crb crc cre cri crm cro crp crr crt ctb ctc cte cti ctm cto ctp ctr ctt ebb ebc ebe ebi ebm ebo ebp ebr ebt ec- ecb ecc ece eci ecm eco ecr ect eeb eec eee eem eeo eep eer eet eib eic eie eii eim eio eip eir eit em- emb emc eme emi emm emo emp emr emt eo- eob eoc eoe eoi eom eoo eop eor eot ep- epb epc epe epi epm epo epp epr ept erb erc ere eri erm ero erp err ert etb etc ete eti etm eto etp etr ett ibb ibc ibe ibi ibm ibo ibp ibr ibt icb icc ice ici icm ico icp icr ict ie- iec iee iei iem iep ier iet iib iic iie iii iim iio iip iir iit im- imb imc ime imi imm imo imp imt io- iob ioc ioe ioi iom ioo iop ior iot ipb ipc ipe ipi ipm ipo ipp ipr ipt ir- irb irc ire iri irm iro irp irr irt itb itc ite iti itm ito itp itt m-o m-r mbb mbc mbe mbi mbm mbo mbp mbr mbt mc- mcb mcc mce mci mcm mco mcp mcr mct meb mec mee mei mem meo mep mer met mi- mib mic mie mii mim mio mip mir mit mmb mmc mme mmi mmm mmo mmp mmr mmt mob moc moe moi mom moo mop mor mot mpb mpc mpe mpi mpm mpo mpp mpr mpt mrb mrc mre mri mrm mro mrp mrr mrt mtb mtc mte mti mtm mto mtp mtr mtt o-i ob- obb obc obe obi obm obo obp obr obt oc- ocb occ oci ocm oco ocp ocr oct oeb oec oee oei oem oeo oep oer oet oib oic oie oii oim oio oip oir oit om- omb omc ome omi omm omo omp omr omt oo- oob ooc ooi oom ooo oop oor oot op- opb opc ope opi opm opo opp opr opt or- orb orc ore ori orm oro orp orr ort ot- otb otc ote oti otm oto otp otr ott p-p pbb pbc pbe pbi pbm pbo pbp pbr pbt pcb pcc pce pci pcm pco pcp pcr pct peb pec pee pei pem peo pep per pet pib pic pie pii pim pio pip pir pit pmb pmc pme pmi pmm pmo pmp pmr pmt pob poc poe poi pom poo pop por pot ppb ppc ppe ppi ppm ppo ppp ppr ppt prb prc pre pri prm pro prp prr prt pt- ptb ptc pte pti ptm pto ptp ptr ptt rbb rbc rbe rbi rbm rbo rbp rbr rbt rcb rcc rce rci rcm rco rcp rcr rct re- reb rec ree rei rem reo rep rer ret rib ric rie rii rim rio rip rir rit rmb rmc rme rmi rmm rmo rmp rmr rmt rob roc roe roi rom roo rop ror rot rpb rpc rpe rpi rpm rpo rpp rpr rpt rrb rrc rri rrm rrp rrr rrt rtb rtc rte rti rtm rto rtp rtr rtt tbb tbc tbe tbi tbm tbo tbp tbr tbt tcb tcc tce tci tcm tco tcp tcr tct te- teb tec tee tei tem teo tep ter tet tib tic tie tii tim tio tip tir tit tmb tmc tme tmi tmm tmo tmp tmr tmt to- tob toc toe toi tom too top tor tot tpb tpc tpe tpi tpm tpo tpp tpr tpt trb trc tre tri trm tro trp trr trt ttb ttc tte tti ttm tto ttp ttr ttt