a-a a-c aaa aac aad aan aao aap aas ac- aca acc acd acn aco acp acs ad- ada adc add adn ado adp ads an- ana anc and ann ano anp ans aoa aoc aod aon aoo aop aos ap- apa apc apd apn apo app aps as- asa asc asd asn aso asp ass c-- caa cac cad can cao cap cas cca ccc ccd ccn cco ccp ccs cda cdc cdd cdn cdo cdp cds cn- cna cnc cnd cnn cno cnp cns co- coa coc cod con coo cop cos cpa cpc cpd cpn cpo cpp cps csa csc csd csn cso csp css daa dac dad dan dao dap das dca dcc dcd dcn dco dcp dcs dda ddc ddd ddn ddo ddp dds dna dnc dnd dnn dno dnp dns doa doc dod don doo dop dos dpa dpc dpd dpn dpo dpp dps dsa dsc dsd dsn dso dsp dss naa nac nad nan nao nap nas nca ncc ncd ncn nco ncp ncs nda ndc ndd ndn ndo ndp nds nna nnc nnn nno nnp nns no- noa noc nod non noo nop nos npa npc npd npn npo npp nps nsa nsc nsd nsn nso nsp nss oaa oac oad oan oao oap oas oc- oca occ ocd ocn oco ocp ocs oda odc odd odn odo odp ods on- ona onc ond onn ono onp ons oo- ooa ooc ood oon ooo oop oos op- opa opc opd opn opo opp ops os- osa osc osd osn oso osp oss p-p paa pac pad pan pao pap pas pca pcc pcd pcn pco pcp pcs pda pdc pdd pdn pdo pdp pds pn- pna pnc pnd pnn pno pnp pns poa poc pod pon poo pop pos ppa ppc ppd ppn ppo ppp pps ps- psa psc psd psn pso psp pss saa sac sad san sao sap sas sca scc scd scn sco scp scs sda sdc sdd sdn sdo sdp sds sna snc snd snn sno snp sns soa soc sod son soo sop sos spa spc spd spn spo spp sps ss- ssa ssc ssd ssn sso ssp sss