oan oao oap oas ob- oba obb obd obe obg obi obl obn obo obp obs oda odb odd ode odg odi odl odn odo odp ods oea oeb oed oee oeg oei oel oen oeo oep oes oga ogd oge ogg ogi ogl ogn ogo ogp ogs oia oib oid oie oii oil oin oio oip ois ola olb old ole olg oli oll oln olo olp ols on- ona onb ond one ong oni onl onn ono onp ons oo- ooa oob ood oog ooi ool oon ooo oop oos op- opa opb opd ope opg opi opl opn opo opp ops os- osa osb osd ose osg osi osl osn oso osp oss p-p paa pab pad pae pag pai pal pan pao pap pas pba pbb pbd pbe pbg pbi pbl pbn pbo pbp pbs pda pdb pdd pde pdg pdi pdl pdn pdo pdp pds pea peb ped pee peg pei pel pen peo pep pes pga pgb pgd pge pgg pgi pgl pgn pgo pgp pgs pia pib pid pie pig pii pil pin pio pip pis pla plb pld ple plg pli pll pln plo plp pls pn- pna pnb pnd pne png pni pnl pnn pno pnp pns poa pob pod poe pog poi pol pon poo pop pos ppa ppb ppd ppe ppg ppi ppl ppn ppo ppp pps ps- psa psb psd pse psg psi psl psn pso psp pss saa sab sad sae sag sai sal san sao sap sas sba sbb sbd sbe sbg sbi sbl sbn sbo sbp sbs sda sdb sdd sde sdg sdi sdl sdn sdo sdp sds se- sea seb sed see seg sei sel sen seo sep ses sga sgb sgd sge sgg sgi sgl sgn sgo sgp sgs sia sib sid sie sig sii sil sin sio sip sis sla slb sld sle slg sli sll sln slo slp sls sna snb snd sne sng sni snl snn sno snp sns soa sob sod soe sog soi sol son soo sop sos spa spb spd spe spg spi spl spn spo spp sps ss- ssa ssb ssd sse ssg ssi ssl ssn sso ssp sss