-er -ic a-a a-b a-c a-i a-t aaa aab aac aad aae aai aao aap aar aat ab- aba abb abc abd abe abi abo abp abr abt ac- aca acb acc acd ace aci aco acp acr act ad- ada adb adc add ade adi ado adp adr adt aea aeb aec aed aee aei aeo aep aer aet ai- aia aib aic aid aie aii aio aip air ait aoa aob aoc aod aoe aoi aoo aop aor aot ap- apa apb apc apd ape api apo app apr apt ar- ara arb arc ard are ari aro arp arr art at- ata atb atc atd ate ati ato atp atr att b-p baa bab bac bad bae bai bao bap bar bat bba bbb bbc bbd bbe bbi bbo bbp bbr bbt bca bcb bcc bcd bce bci bco bcp bcr bct bda bdb bdc bdd bde bdi bdo bdp bdr bdt be- bea beb bec bed bee bei beo bep ber bet bi- bia bib bic bid bie bii bio bip bir bit boa bob boc bod boe boi boo bop bor bot bpa bpb bpc bpd bpe bpi bpo bpp bpr bpt bra brb brd bre bri bro brp brr brt bta btb btc btd bte bti bto btp btr btt c-- caa cab cac cad cae cai cao cap car cat cba cbb cbc cbd cbe cbi cbo cbp cbr cbt cca ccb ccc ccd cce cci cco ccp ccr cct cda cdb cdc cdd cde cdi cdo cdp cdr cdt ce- cea ceb cec ced cee cei ceo cep cer cet ci- cia cib cic cid cie cii cio cip cir cit co- coa cob coc cod coe coi coo cop cor cot cpa cpb cpc cpd cpe cpi cpo cpp cpr cpt cra crb crc crd cre cri cro crp crr crt cta ctb ctc ctd cte cti cto ctp ctr ctt daa dab dac dad dae dai dao dap dar dat dba dbb dbc dbd dbe dbi dbo dbp dbr dbt dca dcb dcc dcd dce dci dco dcp dcr dct dda ddb ddc ddd dde ddi ddo ddp ddr ddt de- dea deb dec ded dee dei deo dep der det di- dia dib dic did die dii dio dip dir dit doa dob doc dod doe doi doo dop dor dot dpa dpb dpc dpd dpe dpi dpo dpp dpr dpt dra drb drc drd dre dri dro drp drr drt dta dtb dtc dtd dte dti dto dtp dtr dtt eaa eab eac ead eae eai eao eap ear eat eba ebb ebc ebd ebe ebi ebo ebp ebr ebt ec- eca ecb ecc ecd ece eci eco ecr ect ed- eda edb edc edd ede edi edo edp edr edt eea eeb eec eed eee eeo eep eer eet eia eib eic eid eie eii eio eip eir eit eo- eoa eob eoc eod eoe eoi eoo eop eor eot ep- epa epb epc epd epe epi epo epp epr ept era erb erc erd ere eri ero erp err ert eta etb etc etd ete eti eto etp etr ett i-d ia- iaa iab iac iad iae iai iao iap iar iat iba ibb ibc ibd ibe ibi ibo ibp ibr ibt ica icb icc icd ice ici ico icp icr ict ida idb idc idd ide idi ido idp idr idt ie- iea iec ied iee iei iep ier iet iia iib iic iid iie iii iio iip iir iit io- ioa iob ioc iod ioe ioi ioo iop ior iot ipa ipb ipc ipd ipe ipi ipo ipp ipr ipt ir- ira irb irc ird ire iri iro irp irr irt ita itb itc itd ite iti ito itp itt o-i oaa oab oac oad oae oai oao oap oar oat ob- oba obb obc obd obe obi obo obp obr obt oc- oca ocb occ ocd oci oco ocp ocr oct oda odb odc odd ode odi odo odp odr odt oea oeb oec oed oee oei oeo oep oer oet oia oib oic oid oie oii oio oip oir oit oo- ooa oob ooc ood ooi ooo oop oor oot op- opa opb opc opd ope opi opo opp opr opt or- ora orb orc ord ore ori oro orp orr ort ot- ota otb otc otd ote oti oto otp otr ott p-p paa pab pac pad pae pai pao pap par pat pba pbb pbc pbd pbe pbi pbo pbp pbr pbt pca pcb pcc pcd pce pci pco pcp pcr pct pda pdb pdc pdd pde pdi pdo pdp pdr pdt pea peb pec ped pee pei peo pep per pet pia pib pic pid pie pii pio pip pir pit poa pob poc pod poe poi poo pop por pot ppa ppb ppc ppd ppe ppi ppo ppp ppr ppt pra prb prc prd pre pri pro prp prr prt pt- pta ptb ptc ptd pte pti pto ptp ptr ptt ra- raa rab rac rad rae rai rao rap rar rat rba rbb rbc rbd rbe rbi rbo rbp rbr rbt rca rcb rcc rcd rce rci rco rcp rcr rct rda rdb rdc rdd rde rdi rdo rdp rdr rdt re- rea reb rec red ree rei reo rep rer ret ria rib ric rid rie rii rio rip rir rit roa rob roc rod roe roi roo rop ror rot rpa rpb rpc rpd rpe rpi rpo rpp rpr rpt rra rrb rrc rrd rri rrp rrr rrt rta rtb rtc rtd rte rti rto rtp rtr rtt taa tab tac tad tae tai tao tap tar tat tba tbb tbc tbd tbe tbi tbo tbp tbr tbt tca tcb tcc tcd tce tci tco tcp tcr tct tda tdb tdc tdd tde tdi tdo tdp tdr tdt te- tea teb tec ted tee tei teo tep ter tet tia tib tic tid tie tii tio tip tir tit to- toa tob toc tod toe