a-a a-c aaa aac aah aao aap aar aas ac- aca acc ach aco acp acr acs aha ahc ahh aho ahp ahr ahs aoa aoc aoh aoo aop aor aos ap- apa apc aph apo app apr aps ar- ara arc arh aro arp arr ars as- asa asc ash aso asp asr ass c-- caa cac cah cao cap car cas cca ccc cch cco ccp ccr ccs ch- cha chc chh cho chp chr chs co- coa coc coh coo cop cor cos cpa cpc cph cpo cpp cpr cps cra crc crh cro crp crr crs csa csc csh cso csp csr css haa hac hah hao hap har has hca hcc hch hco hcp hcr hcs hha hhc hhh hho hhp hhr hhs hoa hoc hoh hoo hop hor hos hpa hpc hph hpo hpp hpr hps hr- hra hrc hrh hro hrp hrr hrs hsa hsc hsh hsp hsr hss oaa oac oah oao oap oar oas oc- oca occ och oco ocp ocr ocs oha ohc ohh oho ohp ohr ohs oo- ooa ooc ooh ooo oop oor oos op- opa opc oph opo opp opr ops or- ora orc orh oro orp orr ors os- osa osc osh oso osp osr oss p-p paa pac pah pao pap par pas pca pcc pch pco pcp pcr pcs pha phc pho php phr phs poa poc poh poo pop por pos ppa ppc pph ppo ppp ppr pps pra prc prh pro prp prr prs ps- psa psc psh pso psp psr pss ra- raa rac rah rao rap rar ras rca rcc rch rco rcp rcr rcs rh- rha rhc rhh rho rhp rhr rhs roa roc roh roo rop ror ros rpa rpc rph rpo rpp rpr rps rra rrc rrh rrp rrr rrs rsa rsc rsh rso rsp rsr rss saa sac sah sao sap sar sas sca scc sch sco scp scr scs sh- sha shc shh sho shp shr shs soa soc soh soo sop sor sos spa spc sph spo spp spr sps sr- sra src srh sro srp srr srs ss- ssa ssc ssh sso ssp ssr sss