oah oai oal oao oap oar ob- oba obb obc obd obe obh obi obl obo obp obr oc- oca ocb occ ocd och oci ocl oco ocp ocr oda odb odc odd ode odh odi odl odo odp odr oea oeb oec oed oee oeh oei oel oeo oep oer oha ohc ohd ohe ohh ohi ohl oho ohp ohr oia oib oic oid oie oii oil oio oip oir ola olb olc old ole oli oll olo olp oo- ooa oob ooc ood ooh ooi ool ooo oop oor op- opa opb opc opd ope oph opi opl opo opp opr or- ora orb orc ord ore orh ori orl oro orp orr p-p paa pab pac pad pae pah pai pal pao pap par pba pbb pbc pbd pbe pbi pbl pbo pbp pbr pca pcb pcc pcd pce pch pci pcl pco pcp pcr pda pdb pdc pdd pde pdh pdi pdl pdo pdp pdr pea peb pec ped pee peh pei pel peo pep per pha phb phc phd phe phi phl pho php phr pia pib pic pid pie pih pii pil pio pip pir pla plb plc pld ple plh pli pll plo plp plr poa pob poc pod poe poh poi pol poo pop por ppa ppb ppc ppd ppe pph ppi ppl ppo ppp ppr pra prb prc prd pre prh pri prl pro prp prr ra- raa rab rac rad rae rah rai ral rao rap rar rba rbb rbc rbd rbe rbh rbi rbl rbo rbp rbr rca rcb rcc rcd rce rch rci rcl rco rcp rcr rda rdb rdc rdd rde rdh rdi rdl rdo rdp rdr re- rea reb rec red ree reh rei rel reo rep rer rh- rha rhb rhc rhd rhe rhh rhi rhl rho rhp rhr ria rib ric rid rie rih rii ril rio rip rir rla rlc rld rle rlh rli rll rlo rlp rlr roa rob roc rod roe roh roi rol roo rop ror rpa rpb rpc rpd rpe rph rpi rpl rpo rpp rpr rra rrb rrc rrd rrh rri rrl rrp rrr