-er a-a a-c a-t aaa aac aae aak aar aat aav ac- aca acc ace ack acr act acv aea aec aee aek aer aet aev aka akc ake akk akr akv ar- ara arc are ark arr art arv at- ata atc ate atr att atv av- ava avc ave avk avr avt c-- caa cac cae cak car cat cav cca ccc cce cck ccr cct ccv ce- cea cec cee cek cer cet cev cka ckc ckt cra crc cre crk crr crt crv cta ctc cte ctk ctr ctt ctv cva cvc cve cvk cvr cvt cvv eaa eac eae eak ear eat eav ec- eca ecc ece eck ecr ect ecv eea eec eee eek eer eet eev eka ekc eke ekr ekt ekv era erc ere erk err ert erv eta etc ete etk etr ett etv eva evc eve evr evt evv k-t ka- kaa kac kae kak kar kat kav kca kcc kce kck kcr kct ke- kea kec kee kek ker ket kev kkc kke kkk kkr kkt kkv kra krc krk krr krt krv kta ktc kte ktk ktr ktt ktv kva kvk kvr kvv ra- raa rac rae rak rar rat rav rca rcc rce rcr rct rcv re- rea rec ree rek rer ret rev rkc rke rkk rkt rkv rra rrc rrk rrr rrt rta rtc rte rtk rtr rtt rtv rva rvc rve rvr rvt rvv taa tac tae tak tar tat tav tca tcc tce tck tcr tct tcv te- tea tec tee tek ter tet tev tka tkc tke tkk tkr tkt tra trc tre trk trr trt trv tta ttc tte ttk ttr ttt ttv tva tvc tve tvk tvr tvt v-a v-e vaa vac vae vak var vat vav vca vcc vce vcr vct vea vec vee vek ver vet vka vkt vra vrc vre vrk vrr vrt vta vtc vte vtk vtr vtt vtv vva vvc vvr vvt vvv