-er a-a a-c aaa aac aad aae aap aar aas aav ac- aca acc acd ace acp acr acs acv ad- ada adc add ade adp adr ads adv aea aec aed aee aep aer aes aev ap- apa apc apd ape app apr aps apv ar- ara arc ard are arp arr ars arv as- asa asc asd ase asp asr ass asv av- ava avc avd ave avp avr avs c-- caa cac cad cae cap car cas cav cca ccc ccd cce ccp ccr ccs ccv cda cdc cdd cde cdp cdr cds cdv ce- cea cec ced cee cep cer ces cev cpa cpc cpd cpe cpp cpr cps cpv cra crc crd cre crp crr crs crv csa csc csd cse csp csr css csv cva cvc cvd cve cvp cvr cvs cvv daa dac dad dae dap dar das dav dca dcc dcd dce dcp dcr dcs dcv dda ddc ddd dde ddp ddr dds de- dea dec ded dee dep der des dev dpa dpc dpd dpe dpp dpr dps dpv dra drc drd dre drp drr drs drv dsa dsc dsd dse dsp dsr dss dsv dva dvc dvd dve dvp dvr dvs eaa eac ead eae eap ear eas eav ec- eca ecc ecd ece ecr ecs ecv ed- eda edc edd ede edp edr eds eea eec eed eee eep eer ees eev ep- epa epc epd epe epp epr eps era erc erd ere erp err ers erv es- esa esc esd ese esp esr ess esv eva evc evd eve evp evr evs evv p-p paa pac pad pae pap par pas pav pca pcc pcd pce pcp pcr pcs pcv pda pdc pdd pde pdp pdr pds pdv pea pec ped pee pep per pes pev ppa ppc ppd ppe ppp ppr pps ppv pra prc prd pre prp prr prs prv ps- psa psc psd pse psp psr pss psv pva pvc pvd pve pvp pvr pvs pvv ra- raa rac rad rae rap rar ras rav rca rcc rcd rce rcp rcr rcs rcv rda rdc rdd rde rdp rdr rds rdv re- rea rec red ree rep rer res rev rpa rpc rpd rpe rpp rpr rps rpv rra rrc rrd rrp rrr rrs rsa rsc rsd rse rsp rsr rss rsv rva rvc rvd rve rvp rvr rvs rvv saa sac sad sae sap sar sas sav sca scc scd sce scp scr scs scv sda sdc sdd sde sdp sdr sds sdv se- sea sec sed see sep ser ses sev spa spc spd spe spp spr sps spv sr- sra src srd sre srp srr srs srv ss- ssa ssc ssd sse ssp ssr sss ssv sva svc svd sve svp svr svs svv v-a v-e vaa vac vad vae vap var vas vav vca vcc vcd vce vcp vcr vcs vdc vdd vde vdp vdr vds vdv vea vec ved vee vep ver ves vpa vpc vpd vpe vpp vpr vps vra vrc vrd vre vrp vrr vrs vsa vsc vsd vse vsp vsr vss vsv vva vvc vvr vvs vvv