oal oam oan oao oap oar ob- oba obb obd obe obi obl obm obn obo obp obr oda odb odd ode odi odl odm odn odo odp odr oea oeb oed oee oei oel oem oen oeo oep oer oia oib oid oie oii oil oim oin oio oip oir ola olb old ole oli oll olm oln olo olp om- oma omb omd ome omi oml omm omn omo omp omr on- ona onb ond one oni onl onn ono onp onr oo- ooa oob ood ooi ool oom oon ooo oop oor op- opa opb opd ope opi opl opm opn opo opp opr or- ora orb ord ore ori orl orm orn oro orp orr p-p paa pab pad pae pai pal pam pan pao pap par pba pbb pbd pbe pbi pbl pbm pbn pbo pbp pbr pda pdb pdd pde pdi pdl pdm pdn pdo pdp pdr pea peb ped pee pei pel pem pen peo pep per pia pib pid pie pii pil pim pin pio pip pir pla plb pld ple pli pll plm pln plo plp plr pma pmb pmd pme pmi pml pmm pmn pmo pmp pmr pn- pna pnb pnd pne pni pnl pnm pnn pno pnp pnr poa pob pod poe poi pol pom pon poo pop por ppa ppb ppd ppe ppi ppl ppm ppn ppo ppp ppr pra prb prd pre pri prl prm prn pro prp prr ra- raa rab rad rae rai ral ram ran rao rap rar rba rbb rbd rbe rbi rbl rbm rbn rbo rbp rbr rda rdb rdd rde rdi rdl rdm rdn rdo rdp rdr re- rea reb red ree rei rel rem ren reo rep rer ria rib rid rie rii ril rim rin rio rip rir rla rld rle rli rll rlm rln rlo rlp rlr rma rmb rmd rme rmi rml rmm rmn rmo rmp rmr rna rnb rnd rni rnm rnn rno rnp rnr roa rob rod roe roi rol rom ron roo rop ror rpa rpb rpd rpe rpi rpl rpm rpn rpo rpp rpr rra rrb rrd rri rrl rrm rrn rrp rrr