-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aap aar aas aat ab- aba abb abc abe abf abi abp abr abs abt ac- aca acb acc ace acf aci acp acr acs act aea aeb aec aee aef aei aep aer aes aet af- afa afb afc afe aff afi afp afr afs aft ai- aia aib aic aie aif aii aip air ais ait ap- apa apb apc ape apf api app apr aps apt ar- ara arb arc are arf ari arp arr ars art as- asa asb asc ase asf asi asp asr ass ast at- ata atb atc ate atf ati atp atr ats att b-p baa bab bac bae baf bai bap bar bas bat bba bbb bbc bbe bbf bbi bbp bbr bbs bbt bca bcb bcc bce bcf bci bcp bcr bcs bct be- bea beb bec bee bef bei bep ber bes bet bfa bfb bfc bfe bff bfi bfp bfr bfs bft bi- bia bib bic bie bif bii bip bir bis bit bpa bpb bpc bpe bpf bpi bpp bpr bps bpt bra brb bre brf bri brp brr brs brt bsa bsb bsc bse bsf bsi bsp bsr bss bst bta btb btc bte btf bti btp btr bts btt c-- caa cab cac cae caf cai cap car cas cat cba cbb cbc cbe cbf cbi cbp cbr cbs cbt cca ccb ccc cce ccf cci ccp ccr ccs cct ce- cea ceb cec cee cef cei cep cer ces cet cfa cfb cfc cfe cff cfi cfp cfr cfs cft ci- cia cib cic cie cif cii cip cir cis cit cpa cpb cpc cpe cpf cpi cpp cpr cps cpt cra crb crc cre crf cri crp crr crs crt csa csb csc cse csf csi csp csr css cst cta ctb ctc cte ctf cti ctp ctr cts ctt eaa eab eac eae eaf eai eap ear eas eat eba ebb ebc ebe ebf ebi ebp ebr ebs ebt ec- eca ecb ecc ece ecf eci ecr ecs ect eea eeb eec eee eef eep eer ees eet ef- efa efb efc efe eff efi efp efr efs eft eia eib eic eie eif eii eip eir eis eit ep- epa epb epc epe epf epi epp epr eps ept era erb erc ere erf eri erp err ers ert es- esa esb esc ese esf esi esp esr ess est eta etb etc ete etf eti etp etr ets ett faa fab fac fae faf fai fap far fas fat fba fbb fbc fbe fbf fbi fbp fbr fbs fbt fca fcb fcc fce fcf fci fcp fcr fcs fct fea feb fec fee fef fei fep fer fes fet ffa ffc ffe fff ffi ffp ffr ffs fft fia fib fic fie fif fii fip fir fis fit fpa fpb fpc fpe fpi fpp fpr fps fpt fra frb frc fre frf fri frp frr frs frt fsa fsb fsc fse fsf fsi fsp fsr fss fst fta ftb ftc fte ftf fti ftp ftr fts ftt i-f ia- iaa iab iac iae iaf iai iap iar ias iat iba ibb ibc ibe ibf ibi ibp ibr ibs ibt ica icb icc ice icf ici icp icr ics ict ie- iea iec iee ief iei iep ier ies iet ifa ifb ifc ife iff ifi ifp ifr ifs ift iia iib iic iie iif iii iip iir iis iit ipa ipb ipc ipe ipf ipi ipp ipr ips ipt ir- ira irb irc ire irf iri irp irr irs irt is- isa isb isc ise isf isi isp isr iss ist ita itb itc ite itf iti itp its itt p-p paa pab pac pae paf pai pap par pas pat pba pbb pbc pbe pbf pbi pbp pbr pbs pbt pca pcb pcc pce pcf pci pcp pcr pcs pct pea peb pec pee pef pei pep per pes pet pfa pfb pfc pfe pff pfi pfp pfr pfs pft pia pib pic pie pif pii pip pir pis pit ppa ppb ppc ppe ppf ppi ppp ppr pps ppt pra prb prc pre prf pri prp prr prs prt ps- psa psb psc pse psf psi psp psr pss pst pt- pta ptb ptc pte ptf pti ptp ptr pts ptt ra- raa rab rac rae raf rai rap rar ras rat rba rbb rbc rbe rbf rbi rbp rbr rbs rbt rca rcb rcc rce rcf rci rcp rcr rcs rct re- rea reb rec ree ref rei rep rer res ret rfa rfb rfc rfe rff rfi rfp rfr rfs rft ria rib ric rie rif rii rip rir ris rit rpa rpb rpc rpe rpf rpi rpp rpr rps rpt rra rrb rrc rrf rri rrp rrr rrs rrt rsa rsb rsc rse rsf rsi rsp rsr rss rst rta rtb rtc rte rtf rti rtp rtr rts rtt saa sab sac sae saf sai sap sar sas sat sba sbb sbc sbe sbf sbi sbp sbr sbs sbt sca scb scc sce scf sci scp scr scs sct se- sea seb sec see sef sei sep ser ses set sfa sfb sfc sfe sff sfi sfp sfr sfs sft sia sib sic sie sif sii sip sir sis sit spa spb spc spe spf spi spp spr sps spt sr- sra srb src sre srf sri srp srr srs srt ss- ssa ssb ssc sse ssf ssi ssp ssr sss sst sta stb stc ste stf sti stp str sts stt taa tab tac tae taf tai tap tar tas tat tba tbb tbc tbe tbf tbi tbp tbr tbs tbt tca tcb tcc tce tcf tci tcp tcr tcs tct te- tea teb tec tee tef tei tep ter tes tet tfa tfb tfc tfe tff tfi tfp tfr tfs tft tia tib tic tie tif tii tip tir tis tit tpa tpb tpc tpe tpf tpi tpp tpr tps