-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aap aar aat ab- aba abb abc abe abi abp abr abt ac- aca acb acc ace aci acp acr act aea aeb aec aee aei aep aer aet ai- aia aib aic aie aii aip air ait ap- apa apb apc ape api app apr apt ar- ara arb arc are ari arp arr art at- ata atb atc ate ati atp atr att b-p baa bab bac bae bai bap bar bat bba bbb bbc bbe bbi bbp bbr bbt bca bcb bcc bce bci bcp bcr bct be- bea beb bec bee bei bep ber bet bi- bia bib bic bie bii bip bir bit bpa bpb bpc bpe bpi bpp bpr bpt bra brb bre bri brp brr brt bta btb btc bte bti btp btr btt c-- caa cab cac cae cai cap car cat cba cbb cbc cbe cbi cbp cbr cbt cca ccb ccc cce cci ccp ccr cct ce- cea ceb cec cee cei cep cer cet ci- cia cib cic cie cii cip cir cit cpa cpb cpc cpe cpi cpp cpr cpt cra crb crc cre cri crp crr crt cta ctb ctc cte cti ctp ctr ctt eaa eab eac eae eai eap ear eat eba ebb ebc ebe ebi ebp ebr ebt ec- eca ecb ecc ece eci ecr ect eea eeb eec eee eep eer eet eia eib eic eie eii eip eir eit ep- epa epb epc epe epi epp epr ept era erb erc ere eri erp err ert eta etb etc ete eti etp etr ett ia- iaa iab iac iae iai iap iar iat iba ibb ibc ibe ibi ibp ibr ibt ica icb icc ice ici icp icr ict ie- iea iec iee iei iep ier iet iia iib iic iie iii iip iir iit ipa ipb ipc ipe ipi ipp ipr ipt ir- ira irb irc ire iri irp irr irt ita itb itc ite iti itp itt p-p paa pab pac pae pai pap par pat pba pbb pbc pbe pbi pbp pbr pbt pca pcb pcc pce pci pcp pcr pct pea peb pec pee pei pep per pet pia pib pic pie pii pip pir pit ppa ppb ppc ppe ppi ppp ppr ppt pra prb prc pre pri prp prr prt pt- pta ptb ptc pte pti ptp ptr ptt ra- raa rab rac rae rai rap rar rat rba rbb rbc rbe rbi rbp rbr rbt rca rcb rcc rce rci rcp rcr rct re- rea reb rec ree rei rep rer ret ria rib ric rie rii rip rir rit rpa rpb rpc rpe rpi rpp rpr rpt rra rrb rrc rri rrp rrr rrt rta rtb rtc rte rti rtp rtr rtt taa tab tac tae tai tap tar tat tba tbb tbc tbe tbi tbp tbr tbt tca tcb tcc tce tci tcp tcr tct te- tea teb tec tee tei tep ter tet tia tib tic tie tii tip tir tit tpa tpb tpc tpe tpi tpp tpr tpt tra trb trc tre tri trp trr trt tta ttb ttc tte tti ttp ttr ttt