-er -ic a-a a-c a-i a-t aaa aac aae aai aap aar aat ac- aca acc ace aci acp acr act aea aec aee aei aep aer aet ai- aia aic aie aii aip air ait ap- apa apc ape api app apr apt ar- ara arc are ari arp arr art at- ata atc ate ati atp atr att c-- caa cac cae cai cap car cat cca ccc cce cci ccp ccr cct ce- cea cec cee cei cep cer cet ci- cia cic cie cii cip cir cit cpa cpc cpe cpi cpp cpr cpt cra crc cre cri crp crr crt cta ctc cte cti ctp ctr ctt eaa eac eae eai eap ear eat ec- eca ecc ece eci ecr ect eea eec eee eep eer eet eia eic eie eii eip eir eit ep- epa epc epe epi epp epr ept era erc ere eri erp err ert eta etc ete eti etp etr ett ia- iaa iac iae iai iap iar iat ica icc ice ici icp icr ict ie- iea iec iee iei iep ier iet iia iic iie iii iip iir iit ipa ipc ipe ipi ipp ipr ipt ir- ira irc ire iri irp irr irt ita itc ite iti itp itt p-p paa pac pae pai pap par pat pca pcc pce pci pcp pcr pct pea pec pee pei pep per pet pia pic pie pii pip pir pit ppa ppc ppe ppi ppp ppr ppt pra prc pre pri prp prr prt pt- pta ptc pte pti ptp ptr ptt ra- raa rac rae rai rap rar rat rca rcc rce rci rcp rcr rct re- rea rec ree rei rep rer ret ria ric rie rii rip rir rit rpa rpc rpe rpi rpp rpr rpt rra rrc rri rrp rrr rrt rta rtc rte rti rtp rtr rtt taa tac tae tai tap tar tat tca tcc tce tci tcp tcr tct te- tea tec tee tei tep ter tet tia tic tie tii tip tir tit tpa tpc tpe tpi tpp tpr tpt tra trc tre tri trp trr trt tta ttc tte tti ttp ttr ttt