a-a a-b a-z aaa aab aah aao aap aas aaz ab- aba abb abh abo abp abs abz aha ahb ahh aho ahp ahs ahz aoa aob aoh aoo aop aos ap- apa apb aph apo app aps as- asa asb ash aso asp ass asz az- aza azb azo azp azs azz b-p baa bab bah bao bap bas baz bba bbb bbh bbo bbp bbs bha bhb bhh bho bhp bhs boa bob boh boo bop bos boz bpa bpb bph bpo bpp bps bsa bsb bsh bso bsp bss bza bzh bzo bzp bzs bzz haa hab hah hao hap has haz hba hbb hbh hbo hbp hbs hbz hha hhb hhh hho hhp hhs hhz hoa hob hoh hoo hop hos hpa hpb hph hpo hpp hps hsa hsb hsh hsp hss hsz hzo hzp hzs oaa oab oah oao oap oas ob- oba obb obh obo obp obs oha ohh oho ohp ohs oo- ooa oob ooh ooo oop oos op- opa opb oph opo opp ops os- osa osb osh oso osp oss oza ozo ozs ozz p-p paa pab pah pao pap pas paz pba pbb pbo pbp pbs pbz pha phb pho php phs poa pob poh poo pop pos poz ppa ppb pph ppo ppp pps ppz ps- psa psb psh pso psp pss pzp saa sab sah sao sap sas saz sba sbb sbh sbo sbp sbs sh- sha shb shh sho shp shs soa sob soh soo sop sos soz spa spb sph spo spp sps spz ss- ssa ssb ssh sso ssp sss ssz sza szp zaa zab zah zao zap zas zaz zbb zbs zha zho zhs zo- zoa zob zoo zos zpo zpp zsa zsh zsz zzs zzz