-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aao aap aar aat ab- aba abb abc abe abf abi abo abp abr abt ac- aca acb acc ace acf aci aco acp acr act aea aeb aec aee aef aei aeo aep aer aet af- afa afb afc afe aff afi afo afp afr aft ai- aia aib aic aie aif aii aio aip air ait aoa aob aoc aoe aof aoi aoo aop aor aot ap- apa apb apc ape apf api apo app apr apt ar- ara arb arc are arf ari aro arp arr art at- ata atb atc ate atf ati ato atp atr att b-p baa bab bac bae baf bai bao bap bar bat bba bbb bbc bbe bbf bbi bbo bbp bbr bbt bca bcb bcc bce bcf bci bco bcp bcr bct be- bea beb bec bee bef bei beo bep ber bet bfa bfb bfc bfe bff bfi bfo bfp bfr bft bi- bia bib bic bie bif bii bio bip bir bit boa bob boc boe bof boi boo bop bor bot bpa bpb bpc bpe bpf bpi bpo bpp bpr bpt bra brb bre brf bri bro brp brr brt bta btb btc bte btf bti bto btp btr btt c-- caa cab cac cae caf cai cao cap car cat cba cbb cbc cbe cbf cbi cbo cbp cbr cbt cca ccb ccc cce ccf cci cco ccp ccr cct ce- cea ceb cec cee cef cei ceo cep cer cet cfa cfb cfc cfe cff cfi cfo cfp cfr cft ci- cia cib cic cie cif cii cio cip cir cit co- coa cob coc coe cof coi coo cop cor cot cpa cpb cpc cpe cpf cpi cpo cpp cpr cpt cra crb crc cre crf cri cro crp crr crt cta ctb ctc cte ctf cti cto ctp ctr ctt eaa eab eac eae eaf eai eao eap ear eat eba ebb ebc ebe ebf ebi ebo ebp ebr ebt ec- eca ecb ecc ece ecf eci eco ecr ect eea eeb eec eee eef eeo eep eer eet ef- efa efb efc efe eff efi efo efp efr eft eia eib eic eie eif eii eio eip eir eit eo- eoa eob eoc eoe eof eoi eoo eop eor eot ep- epa epb epc epe epf epi epo epp epr ept era erb erc ere erf eri ero erp err ert eta etb etc ete etf eti eto etp etr ett faa fab fac fae faf fai fao fap far fat fba fbb fbc fbe fbf fbi fbo fbp fbr fbt fca fcb fcc fce fcf fci fco fcp fcr fct fea feb fec fee fef fei feo fep fer fet ffa ffc ffe fff ffi ffo ffp ffr fft fia fib fic fie fif fii fip fir fit foa fob foc foe fof foi foo fop for fot fpa fpb fpc fpe fpi fpo fpp fpr fpt fra frb frc fre frf fri fro frp frr frt fta ftb ftc fte ftf fti fto ftp ftr ftt i-f ia- iaa iab iac iae iaf iai iao iap iar iat iba ibb ibc ibe ibf ibi ibo ibp ibr ibt ica icb icc ice icf ici ico icp icr ict ie- iea iec iee ief iei iep ier iet ifa ifb ifc ife iff ifi ifo ifp ifr ift iia iib iic iie iif iii iio iip iir iit io- ioa iob ioc ioe iof ioi ioo iop ior iot ipa ipb ipc ipe ipf ipi ipo ipp ipr ipt ir- ira irb irc ire irf iri iro irp irr irt ita itb itc ite itf iti ito itp itt o-i oaa oab oac oae oaf oai oao oap oar oat ob- oba obb obc obe obf obi obo obp obr obt oc- oca ocb occ ocf oci oco ocp ocr oct oea oeb oec oee oef oei oeo oep oer oet of- ofa ofb ofc ofe off ofi ofo ofp ofr oft oia oib oic oie oif oii oio oip oir oit oo- ooa oob ooc oof ooi ooo oop oor oot op- opa opb opc ope opf opi opo opp opr opt or- ora orb orc ore orf ori oro orp orr ort ot- ota otb otc ote otf oti oto otp otr ott p-p paa pab pac pae paf pai pao pap par pat pba pbb pbc pbe pbf pbi pbo pbp pbr pbt pca pcb pcc pce pcf pci pco pcp pcr pct pea peb pec pee pef pei peo pep per pet pfa pfb pfc pfe pff pfi pfo pfp pfr pft pia pib pic pie pif pii pio pip pir pit poa pob poc poe pof poi poo pop por pot ppa ppb ppc ppe ppf ppi ppo ppp ppr ppt pra prb prc pre prf pri pro prp prr prt pt- pta ptb ptc pte ptf pti pto ptp ptr ptt ra- raa rab rac rae raf rai rao rap rar rat rba rbb rbc rbe rbf rbi rbo rbp rbr rbt rca rcb rcc rce rcf rci rco rcp rcr rct re- rea reb rec ree ref rei reo rep rer ret rfa rfb rfc rfe rff rfi rfo rfp rfr rft ria rib ric rie rif rii rio rip rir rit roa rob roc roe rof roi roo rop ror rot rpa rpb rpc rpe rpf rpi rpo rpp rpr rpt rra rrb rrc rrf rri rrp rrr rrt rta rtb rtc rte rtf rti rto rtp rtr rtt taa tab tac tae taf tai tao tap tar tat tba tbb tbc tbe tbf tbi tbo tbp tbr tbt tca tcb tcc tce tcf tci tco tcp tcr tct te- tea teb tec tee tef tei teo tep ter tet tfa tfb tfc tfe tff tfi tfo tfp tfr tft tia tib tic tie tif tii tio tip tir tit to- toa tob toc toe tof toi too top tor