-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aap aar aat aav ab- aba abb abc abe abi abp abr abt abv ac- aca acb acc ace aci acp acr act acv aea aeb aec aee aei aep aer aet aev ai- aia aib aic aie aii aip air ait aiv ap- apa apb apc ape api app apr apt apv ar- ara arb arc are ari arp arr art arv at- ata atb atc ate ati atp atr att atv av- ava avb avc ave avi avp avr avt b-p baa bab bac bae bai bap bar bat bav bba bbb bbc bbe bbi bbp bbr bbt bca bcb bcc bce bci bcp bcr bct bcv be- bea beb bec bee bei bep ber bet bev bi- bia bib bic bie bii bip bir bit biv bpa bpb bpc bpe bpi bpp bpr bpt bpv bra brb bre bri brp brr brt brv bta btb btc bte bti btp btr btt btv bva bvb bvc bve bvi bvp bvr bvt bvv c-- caa cab cac cae cai cap car cat cav cba cbb cbc cbe cbi cbp cbr cbt cbv cca ccb ccc cce cci ccp ccr cct ccv ce- cea ceb cec cee cei cep cer cet cev ci- cia cib cic cie cii cip cir cit civ cpa cpb cpc cpe cpi cpp cpr cpt cpv cra crb crc cre cri crp crr crt crv cta ctb ctc cte cti ctp ctr ctt ctv cva cvb cvc cve cvi cvp cvr cvt cvv eaa eab eac eae eai eap ear eat eav eba ebb ebc ebe ebi ebp ebr ebt ebv ec- eca ecb ecc ece eci ecr ect ecv eea eeb eec eee eep eer eet eev eia eib eic eie eii eip eir eit eiv ep- epa epb epc epe epi epp epr ept era erb erc ere eri erp err ert erv eta etb etc ete eti etp etr ett etv eva evb evc eve evi evp evr evt evv i-v ia- iaa iab iac iae iai iap iar iat iav iba ibb ibc ibe ibi ibp ibr ibt ibv ica icb icc ice ici icp icr ict icv ie- iea iec iee iei iep ier iet iev iia iib iic iie iii iip iir iit ipa ipb ipc ipe ipi ipp ipr ipt ipv ir- ira irb irc ire iri irp irr irt irv ita itb itc ite iti itp itt itv iva ivb ivc ive ivi ivp ivr ivt ivv p-p paa pab pac pae pai pap par pat pav pba pbb pbc pbe pbi pbp pbr pbt pca pcb pcc pce pci pcp pcr pct pcv pea peb pec pee pei pep per pet pev pia pib pic pie pii pip pir pit piv ppa ppb ppc ppe ppi ppp ppr ppt ppv pra prb prc pre pri prp prr prt prv pt- pta ptb ptc pte pti ptp ptr ptt ptv pva pvb pvc pve pvi pvp pvr pvt pvv ra- raa rab rac rae rai rap rar rat rav rba rbb rbc rbe rbi rbp rbr rbt rca rcb rcc rce rci rcp rcr rct rcv re- rea reb rec ree rei rep rer ret rev ria rib ric rie rii rip rir rit riv rpa rpb rpc rpe rpi rpp rpr rpt rpv rra rrb rrc rri rrp rrr rrt rta rtb rtc rte rti rtp rtr rtt rtv rva rvb rvc rve rvi rvp rvr rvt rvv taa tab tac tae tai tap tar tat tav tba tbb tbc tbe tbi tbp tbr tbt tbv tca tcb tcc tce tci tcp tcr tct tcv te- tea teb tec tee tei tep ter tet tev tia tib tic tie tii tip tir tit tiv tpa tpb tpc tpe tpi tpp tpr tpt tpv tra trb trc tre tri trp trr trt trv tta ttb ttc tte tti ttp ttr ttt ttv tva tvb tvc tve tvi tvp tvr tvt v-a v-e vaa vab vac vae vai vap var vat vav vba vbc vbi vbr vbv vca vcc vce vci vcp vcr vct vea veb vec vee vei vep ver vet vi- via vib vic vie vii vip vir vit viv vpa vpb vpc vpe vpi vpp vpr vpt vra vrb vrc vre vri vrp vrr vrt vta vtb vtc vte vti vtr vtt vtv vva vvb vvc vvi vvr vvt vvv