-er -ic a-a a-c a-i a-t aaa aac aae aai aar aat ac- aca acc ace aci acr act aea aec aee aei aer aet ai- aia aic aie aii air ait ar- ara arc are ari arr art at- ata atc ate ati atr att c-- caa cac cae cai car cat cca ccc cce cci ccr cct ce- cea cec cee cei cer cet ci- cia cic cie cii cir cit cra crc cre cri crr crt cta ctc cte cti ctr ctt eaa eac eae eai ear eat ec- eca ecc ece eci ecr ect eea eec eee eer eet eia eic eie eii eir eit era erc ere eri err ert eta etc ete eti etr ett ia- iaa iac iae iai iar iat ica icc ice ici icr ict ie- iea iec iee iei ier iet iia iic iie iii iir iit ir- ira irc ire iri irr irt ita itc ite iti itt ra- raa rac rae rai rar rat rca rcc rce rci rcr rct re- rea rec ree rei rer ret ria ric rie rii rir rit rra rrc rri rrr rrt rta rtc rte rti rtr rtt taa tac tae tai tar tat tca tcc tce tci tcr tct te- tea tec tee tei ter tet tia tic tie tii tir tit tra trc tre tri trr trt tta ttc tte tti ttr ttt