-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aan aap aar aat ab- aba abb abc abe abi abn abp abr abt ac- aca acb acc ace aci acn acp acr act aea aeb aec aee aei aen aep aer aet ai- aia aib aic aie aii ain aip air ait an- ana anb anc ane ani ann anp anr ant ap- apa apb apc ape api apn app apr apt ar- ara arb arc are ari arn arp arr art at- ata atb atc ate ati atn atp atr att b-p baa bab bac bae bai ban bap bar bat bba bbb bbc bbe bbi bbn bbp bbr bbt bca bcb bcc bce bci bcn bcp bcr bct be- bea beb bec bee bei ben bep ber bet bi- bia bib bic bie bii bin bip bir bit bna bnb bnc bne bni bnn bnp bnr bnt bpa bpb bpc bpe bpi bpn bpp bpr bpt bra brb bre bri brn brp brr brt bta btb btc bte bti btn btp btr btt c-- caa cab cac cae cai can cap car cat cba cbb cbc cbe cbi cbn cbp cbr cbt cca ccb ccc cce cci ccn ccp ccr cct ce- cea ceb cec cee cei cen cep cer cet ci- cia cib cic cie cii cin cip cir cit cn- cna cnb cnc cne cni cnn cnp cnr cnt cpa cpb cpc cpe cpi cpn cpp cpr cpt cra crb crc cre cri crn crp crr crt cta ctb ctc cte cti ctn ctp ctr ctt eaa eab eac eae eai ean eap ear eat eba ebb ebc ebe ebi ebn ebp ebr ebt ec- eca ecb ecc ece eci ecn ecr ect eea eeb eec eee een eep eer eet eia eib eic eie eii ein eip eir eit en- ena enb enc ene eni enn enp enr ent ep- epa epb epc epe epi epn epp epr ept era erb erc ere eri ern erp err ert eta etb etc ete eti etn etp etr ett ia- iaa iab iac iae iai ian iap iar iat iba ibb ibc ibe ibi ibn ibp ibr ibt ica icb icc ice ici icn icp icr ict ie- iea iec iee iei ien iep ier iet iia iib iic iie iii iin iip iir iit in- ina inb inc ine ini inn inp inr int ipa ipb ipc ipe ipi ipn ipp ipr ipt ir- ira irb irc ire iri irn irp irr irt ita itb itc ite iti itn itp itt n-i naa nab nac nae nai nan nap nar nat nba nbb nbc nbe nbi nbn nbp nbr nbt nca ncb ncc nce nci ncn ncp ncr nct ne- nea neb nec nee nei nen nep ner net nia nib nic nie nii nin nip nir nit nna nnb nnc nne nni nnn nnp nnt npa npb npc npe npi npn npp npr npt nra nrb nrc nre nri nrn nrp nrr nrt nta ntb ntc nte nti ntn ntp ntr ntt p-p paa pab pac pae pai pan pap par pat pba pbb pbc pbe pbi pbn pbp pbr pbt pca pcb pcc pce pci pcn pcp pcr pct pea peb pec pee pei pen pep per pet pia pib pic pie pii pin pip pir pit pn- pna pnb pnc pne pni pnn pnp pnr pnt ppa ppb ppc ppe ppi ppn ppp ppr ppt pra prb prc pre pri prn prp prr prt pt- pta ptb ptc pte pti ptn ptp ptr ptt ra- raa rab rac rae rai ran rap rar rat rba rbb rbc rbe rbi rbn rbp rbr rbt rca rcb rcc rce rci rcn rcp rcr rct re- rea reb rec ree rei ren rep rer ret ria rib ric rie rii rin rip rir rit rna rnb rnc rni rnn rnp rnr rnt rpa rpb rpc rpe rpi rpn rpp rpr rpt rra rrb rrc rri rrn rrp rrr rrt rta rtb rtc rte rti rtn rtp rtr rtt taa tab tac tae tai tan tap tar tat tba tbb tbc tbe tbi tbn tbp tbr tbt tca tcb tcc tce tci tcn tcp tcr tct te- tea teb tec tee tei ten tep ter tet tia tib tic tie tii tin tip tir tit tna tnb tnc tne tni tnn tnp tnr tnt tpa tpb tpc tpe tpi tpn tpp tpr tpt tra trb trc tre tri trn trp trr trt tta ttb ttc tte tti ttn ttp ttr ttt