-er a-a a-c a-t aaa aac aae aak aan aar aat aav ac- aca acc ace ack acn acr act acv aea aec aee aek aen aer aet aev aka akc ake akk akn akr akv an- ana anc ane ank ann anr ant anv ar- ara arc are ark arn arr art arv at- ata atc ate atn atr att atv av- ava avc ave avk avn avr avt c-- caa cac cae cak can car cat cav cca ccc cce cck ccn ccr cct ccv ce- cea cec cee cek cen cer cet cev cka ckc ckt cn- cna cnc cne cnn cnr cnt cnv cra crc cre crk crn crr crt crv cta ctc cte ctk ctn ctr ctt ctv cva cvc cve cvk cvn cvr cvt cvv eaa eac eae eak ean ear eat eav ec- eca ecc ece eck ecn ecr ect ecv eea eec eee eek een eer eet eev eka ekc eke ekr ekt ekv en- ena enc ene enk enn enr ent env era erc ere erk ern err ert erv eta etc ete etk etn etr ett etv eva evc eve evn evr evt evv k-t ka- kaa kac kae kak kan kar kat kav kca kcc kce kck kcn kcr kct ke- kea kec kee kek ken ker ket kev kkc kke kkk kkn kkr kkt kkv kn- kna knc kne knk knn knr knt kra krc krk krn krr krt krv kta ktc kte ktk ktn ktr ktt ktv kva kvk kvn kvr kvv naa nac nae nak nan nar nat nav nca ncc nce nck ncn ncr nct ncv ne- nea nec nee nek nen ner net nev nka nkc nke nkk nkn nkr nkt nna nnc nne nnk nnn nnt nnv nra nrc nre nrk nrn nrr nrt nrv nta ntc nte ntk ntn ntr ntt ntv nva nvc nve nvk nvn nvt nvv ra- raa rac rae rak ran rar rat rav rca rcc rce rcn rcr rct rcv re- rea rec ree rek ren rer ret rev rkc rke rkk rkt rkv rna rnc rnn rnr rnt rnv rra rrc rrk rrn rrr rrt rta rtc rte rtk rtn rtr rtt rtv rva rvc rve rvn rvr rvt rvv taa tac tae tak tan tar tat tav tca tcc tce tck tcn tcr tct tcv te- tea tec tee tek ten ter tet tev tka tkc tke tkk tkr tkt tna tnc tne tnk tnn tnr tnt tra trc tre trk trn trr trt trv tta ttc tte ttk ttn ttr ttt ttv tva tvc tve tvk tvn tvr tvt v-a v-e vaa vac vae vak van var vat vav vca vcc vce vcn vcr vct vea vec vee vek ven ver vet vka vkt vn- vna vnr vnv vra vrc vre vrk vrn vrr vrt vta vtc vte vtk vtr vtt vtv vva vvc vvr vvt vvv