obp obs oda odb odd ode odh odi odm odn odo odp ods oea oeb oed oee oeh oei oem oen oeo oep oes oha ohd ohe ohh ohi ohm ohn oho ohp ohs oia oib oid oie oii oim oin oio oip ois om- oma omb omd ome omh omi omm omn omo omp oms on- ona onb ond one onh oni onn ono onp ons oo- ooa oob ood ooh ooi oom oon ooo oop oos op- opa opb opd ope oph opi opm opn opo opp ops os- osa osb osd ose osh osi osm osn oso osp oss p-p paa pab pad pae pah pai pam pan pao pap pas pba pbb pbd pbe pbi pbm pbn pbo pbp pbs pda pdb pdd pde pdh pdi pdm pdn pdo pdp pds pea peb ped pee peh pei pem pen peo pep pes pha phb phd phe phi phm phn pho php phs pia pib pid pie pih pii pim pin pio pip pis pma pmb pmd pme pmh pmi pmm pmn pmo pmp pms pn- pna pnb pnd pne pnh pni pnm pnn pno pnp pns poa pob pod poe poh poi pom pon poo pop pos ppa ppb ppd ppe pph ppi ppm ppn ppo ppp pps ps- psa psb psd pse psh psi psm psn pso psp pss saa sab sad sae sah sai sam san sao sap sas sba sbb sbd sbe sbh sbi sbm sbn sbo sbp sbs sda sdb sdd sde sdh sdi sdm sdn sdo sdp sds se- sea seb sed see seh sei sem sen seo sep ses sh- sha shb shd she shh shi shm shn sho shp shs sia sib sid sie sih sii sim sin sio sip sis sma smb smd sme smh smi smm smn smo smp sms sna snb snd sne sni snm snn sno snp sns soa sob sod soe soh soi som son soo sop sos spa spb spd spe sph spi spm spn spo spp sps ss- ssa ssb ssd sse ssh ssi ssm ssn sso ssp sss