ohd ohe ohh ohi ohl ohm ohn oho ohp ohs oib oid oie oii oil oim oin oio oip ois olb old ole oli oll olm oln olo olp ols om- omb omd ome omh omi oml omm omn omo omp oms on- onb ond one onh oni onl onn ono onp ons oo- oob ood ooh ooi ool oom oon ooo oop oos op- opb opd ope oph opi opl opm opn opo opp ops os- osb osd ose osh osi osl osm osn oso osp oss p-p pbb pbd pbe pbi pbl pbm pbn pbo pbp pbs pdb pdd pde pdh pdi pdl pdm pdn pdo pdp pds peb ped pee peh pei pel pem pen peo pep pes phb phd phe phi phl phm phn pho php phs pib pid pie pih pii pil pim pin pio pip pis plb pld ple plh pli pll plm pln plo plp pls pmb pmd pme pmh pmi pml pmm pmn pmo pmp pms pn- pnb pnd pne pnh pni pnl pnm pnn pno pnp pns pob pod poe poh poi pol pom pon poo pop pos ppb ppd ppe pph ppi ppl ppm ppn ppo ppp pps ps- psb psd pse psh psi psl psm psn pso psp pss sbb sbd sbe sbh sbi sbl sbm sbn sbo sbp sbs sdb sdd sde sdh sdi sdl sdm sdn sdo sdp sds se- seb sed see seh sei sel sem sen seo sep ses sh- shb shd she shh shi shl shm shn sho shp shs sib sid sie sih sii sil sim sin sio sip sis slb sld sle slh sli sll slm sln slo slp sls smb smd sme smh smi sml smm smn smo smp sms snb snd sne sni snl snm snn sno snp sns sob sod soe soh soi sol som son soo sop sos spb spd spe sph spi spl spm spn spo spp sps ss- ssb ssd sse ssh ssi ssl ssm ssn sso ssp sss