-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aao aap aar aat ab- aba abb abc abe abi abm abo abp abr abt ac- aca acb acc ace aci acm aco acp acr act aea aeb aec aee aei aem aeo aep aer aet ai- aia aib aic aie aii aim aio aip air ait ama amb amc ame ami amm amo amp amr amt aoa aob aoc aoe aoi aom aoo aop aor aot ap- apa apb apc ape api apm apo app apr apt ar- ara arb arc are ari arm aro arp arr art at- ata atb atc ate ati atm ato atp atr att b-p baa bab bac bae bai bam bao bap bar bat bba bbb bbc bbe bbi bbm bbo bbp bbr bbt bca bcb bcc bce bci bcm bco bcp bcr bct be- bea beb bec bee bei bem beo bep ber bet bi- bia bib bic bie bii bim bio bip bir bit bma bmb bmc bme bmi bmm bmo bmp bmr bmt boa bob boc boe boi bom boo bop bor bot bpa bpb bpc bpe bpi bpm bpo bpp bpr bpt bra brb bre bri brm bro brp brr brt bta btb btc bte bti btm bto btp btr btt c-- caa cab cac cae cai cam cao cap car cat cba cbb cbc cbe cbi cbm cbo cbp cbr cbt cca ccb ccc cce cci ccm cco ccp ccr cct ce- cea ceb cec cee cei cem ceo cep cer cet ci- cia cib cic cie cii cim cio cip cir cit cma cmb cmc cme cmi cmm cmo cmp cmr cmt co- coa cob coc coe coi com coo cop cor cot cpa cpb cpc cpe cpi cpm cpo cpp cpr cpt cra crb crc cre cri crm cro crp crr crt cta ctb ctc cte cti ctm cto ctp ctr ctt eaa eab eac eae eai eam eao eap ear eat eba ebb ebc ebe ebi ebm ebo ebp ebr ebt ec- eca ecb ecc ece eci ecm eco ecr ect eea eeb eec eee eem eeo eep eer eet eia eib eic eie eii eim eio eip eir eit em- ema emb emc eme emi emm emo emp emr emt eo- eoa eob eoc eoe eoi eom eoo eop eor eot ep- epa epb epc epe epi epm epo epp epr ept era erb erc ere eri erm ero erp err ert eta etb etc ete eti etm eto etp etr ett ia- iaa iab iac iae iai iam iao iap iar iat iba ibb ibc ibe ibi ibm ibo ibp ibr ibt ica icb icc ice ici icm ico icp icr ict ie- iea iec iee iei iem iep ier iet iia iib iic iie iii iim iio iip iir iit im- ima imb imc ime imi imm imo imp imt io- ioa iob ioc ioe ioi iom ioo iop ior iot ipa ipb ipc ipe ipi ipm ipo ipp ipr ipt ir- ira irb irc ire iri irm iro irp irr irt ita itb itc ite iti itm ito itp itt m-o m-r maa mab mac mae mai mam mao map mar mat mba mbb mbc mbe mbi mbm mbo mbp mbr mbt mc- mca mcb mcc mce mci mcm mco mcp mcr mct mea meb mec mee mei mem meo mep mer met mi- mia mib mic mie mii mim mio mip mir mit mma mmb mmc mme mmi mmm mmo mmp mmr mmt moa mob moc moe moi mom moo mop mor mot mpa mpb mpc mpe mpi mpm mpo mpp mpr mpt mra mrb mrc mre mri mrm mro mrp mrr mrt mta mtb mtc mte mti mtm mto mtp mtr mtt o-i oaa oab oac oae oai oam oao oap oar oat ob- oba obb obc obe obi obm obo obp obr obt oc- oca ocb occ oci ocm oco ocp ocr oct oea oeb oec oee oei oem oeo oep oer oet oia oib oic oie oii oim oio oip oir oit om- oma omb omc ome omi omm omo omp omr omt oo- ooa oob ooc ooi oom ooo oop oor oot op- opa opb opc ope opi opm opo opp opr opt or- ora orb orc ore ori orm oro orp orr ort ot- ota otb otc ote oti otm oto otp otr ott p-p paa pab pac pae pai pam pao pap par pat pba pbb pbc pbe pbi pbm pbo pbp pbr pbt pca pcb pcc pce pci pcm pco pcp pcr pct pea peb pec pee pei pem peo pep per pet pia pib pic pie pii pim pio pip pir pit pma pmb pmc pme pmi pmm pmo pmp pmr pmt poa pob poc poe poi pom poo pop por pot ppa ppb ppc ppe ppi ppm ppo ppp ppr ppt pra prb prc pre pri prm pro prp prr prt pt- pta ptb ptc pte pti ptm pto ptp ptr ptt ra- raa rab rac rae rai ram rao rap rar rat rba rbb rbc rbe rbi rbm rbo rbp rbr rbt rca rcb rcc rce rci rcm rco rcp rcr rct re- rea reb rec ree rei rem reo rep rer ret ria rib ric rie rii rim rio rip rir rit rma rmb rmc rme rmi rmm rmo rmp rmr rmt roa rob roc roe roi rom roo rop ror rot rpa rpb rpc rpe rpi rpm rpo rpp rpr rpt rra rrb rrc rri rrm rrp rrr rrt rta rtb rtc rte rti rtm rto rtp rtr rtt taa tab tac tae tai tam tao tap tar tat tba tbb tbc tbe tbi tbm tbo tbp tbr tbt tca tcb tcc tce tci tcm tco tcp tcr tct te- tea teb tec tee tei tem teo tep ter tet tia tib tic tie tii tim tio tip tir tit tma tmb tmc tme tmi tmm tmo tmp tmr tmt to- toa tob toc toe