-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aap aar aat ab- aba abb abc abe abf abi abp abr abt ac- aca acb acc ace acf aci acp acr act aea aeb aec aee aef aei aep aer aet af- afa afb afc afe aff afi afp afr aft ai- aia aib aic aie aif aii aip air ait ap- apa apb apc ape apf api app apr apt ar- ara arb arc are arf ari arp arr art at- ata atb atc ate atf ati atp atr att b-p baa bab bac bae baf bai bap bar bat bba bbb bbc bbe bbf bbi bbp bbr bbt bca bcb bcc bce bcf bci bcp bcr bct be- bea beb bec bee bef bei bep ber bet bfa bfb bfc bfe bff bfi bfp bfr bft bi- bia bib bic bie bif bii bip bir bit bpa bpb bpc bpe bpf bpi bpp bpr bpt bra brb bre brf bri brp brr brt bta btb btc bte btf bti btp btr btt c-- caa cab cac cae caf cai cap car cat cba cbb cbc cbe cbf cbi cbp cbr cbt cca ccb ccc cce ccf cci ccp ccr cct ce- cea ceb cec cee cef cei cep cer cet cfa cfb cfc cfe cff cfi cfp cfr cft ci- cia cib cic cie cif cii cip cir cit cpa cpb cpc cpe cpf cpi cpp cpr cpt cra crb crc cre crf cri crp crr crt cta ctb ctc cte ctf cti ctp ctr ctt eaa eab eac eae eaf eai eap ear eat eba ebb ebc ebe ebf ebi ebp ebr ebt ec- eca ecb ecc ece ecf eci ecr ect eea eeb eec eee eef eep eer eet ef- efa efb efc efe eff efi efp efr eft eia eib eic eie eif eii eip eir eit ep- epa epb epc epe epf epi epp epr ept era erb erc ere erf eri erp err ert eta etb etc ete etf eti etp etr ett faa fab fac fae faf fai fap far fat fba fbb fbc fbe fbf fbi fbp fbr fbt fca fcb fcc fce fcf fci fcp fcr fct fea feb fec fee fef fei fep fer fet ffa ffc ffe fff ffi ffp ffr fft fia fib fic fie fif fii fip fir fit fpa fpb fpc fpe fpi fpp fpr fpt fra frb frc fre frf fri frp frr frt fta ftb ftc fte ftf fti ftp ftr ftt i-f ia- iaa iab iac iae iaf iai iap iar iat iba ibb ibc ibe ibf ibi ibp ibr ibt ica icb icc ice icf ici icp icr ict ie- iea iec iee ief iei iep ier iet ifa ifb ifc ife iff ifi ifp ifr ift iia iib iic iie iif iii iip iir iit ipa ipb ipc ipe ipf ipi ipp ipr ipt ir- ira irb irc ire irf iri irp irr irt ita itb itc ite itf iti itp itt p-p paa pab pac pae paf pai pap par pat pba pbb pbc pbe pbf pbi pbp pbr pbt pca pcb pcc pce pcf pci pcp pcr pct pea peb pec pee pef pei pep per pet pfa pfb pfc pfe pff pfi pfp pfr pft pia pib pic pie pif pii pip pir pit ppa ppb ppc ppe ppf ppi ppp ppr ppt pra prb prc pre prf pri prp prr prt pt- pta ptb ptc pte ptf pti ptp ptr ptt ra- raa rab rac rae raf rai rap rar rat rba rbb rbc rbe rbf rbi rbp rbr rbt rca rcb rcc rce rcf rci rcp rcr rct re- rea reb rec ree ref rei rep rer ret rfa rfb rfc rfe rff rfi rfp rfr rft ria rib ric rie rif rii rip rir rit rpa rpb rpc rpe rpf rpi rpp rpr rpt rra rrb rrc rrf rri rrp rrr rrt rta rtb rtc rte rtf rti rtp rtr rtt taa tab tac tae taf tai tap tar tat tba tbb tbc tbe tbf tbi tbp tbr tbt tca tcb tcc tce tcf tci tcp tcr tct te- tea teb tec tee tef tei tep ter tet tfa tfb tfc tfe tff tfi tfp tfr tft tia tib tic tie tif tii tip tir tit tpa tpb tpc tpe tpf tpi tpp tpr tpt tra trb trc tre trf tri trp trr trt tta ttb ttc tte ttf tti ttp ttr ttt