ob- oba obb obc obe obg obh obi obo obp obr obs oby oc- oca ocb occ ocg och oci oco ocp ocr ocs oea oeb oec oee oeg oeh oei oeo oep oer oes oey oga ogc oge ogg ogh ogi ogo ogp ogs ogy oha ohc ohe ohg ohh ohi oho ohp ohr ohs oia oib oic oie oii oio oip oir ois oo- ooa oob ooc oog ooh ooi ooo oop oor oos op- opa opb opc ope opg oph opi opo opp opr ops opy or- ora orb orc ore org orh ori oro orp orr ors ory os- osa osb osc ose osg osh osi oso osp osr oss oya oye oyi oyo oys p-p paa pab pac pae pag pah pai pao pap par pas pay pba pbb pbc pbe pbg pbi pbo pbp pbr pbs pby pca pcb pcc pce pcg pch pci pco pcp pcr pcs pea peb pec pee peg peh pei peo pep per pes pey pga pgb pgc pge pgg pgh pgi pgo pgp pgr pgs pgy pha phb phc phe phg phi pho php phr phs phy pia pib pic pie pig pih pii pio pip pir pis poa pob poc poe pog poh poi poo pop por pos poy ppa ppb ppc ppe ppg pph ppi ppo ppp ppr pps pra prb prc pre prg prh pri pro prp prr prs pry ps- psa psb psc pse psg psh psi pso psp psr pss psy py- pya pyb pyc pye pyg pyo pyr pys ra- raa rab rac rae rag rah rai rao rap rar ras ray rba rbb rbc rbe rbg rbh rbi rbo rbp rbr rbs rca rcb rcc rce rcg rch rci rco rcp rcr rcs re- rea reb rec ree reg reh rei reo rep rer res rey rga rgb rgc rge rgg rgh rgi rgo rgp rgr rgs rh- rha rhb rhc rhe rhg rhh rhi rho rhp rhr rhs ria rib ric rie rig rih rii rio rip rir ris riy roa rob roc roe rog roh roi roo rop ror ros roy rpa rpb rpc rpe rpg rph rpi rpo rpp rpr rps rra rrb rrc rrg rrh rri rrp rrr rrs rsa rsb rsc rse rsg rsh rsi rso rsp rsr rss ry- rya ryc rye ryg ryo ryr rys ryy saa sab sac sae sag sah sai sao sap sar sas say sba sbb sbc sbe sbg sbh sbi sbo sbp sbr sbs sby sca scb scc sce scg sch sci sco scp scr scs se- sea seb sec see seg seh sei seo sep ser ses sey sga sgb sgc sge sgg sgh sgi sgo sgp sgr sgs sh- sha shb shc she shg shh shi sho shp shr shs shy sia sib sic sie sig sih sii sio sip sir sis soa sob soc soe sog soh soi soo sop sor sos soy spa spb spc spe spg sph spi spo spp spr sps spy sr- sra srb src sre srg srh sri sro srp srr srs sry ss- ssa ssb ssc sse ssg ssh ssi sso ssp ssr sss sy- sya syb syc sye syg syh syi syp syr sys yaa yab yac yae yag yah yai yao yap yar yas yay ybc ybe ybg ybi ybp ybr ybs yby yca ycc yce ych yci yco ycp ycs ycy yea yeb yec yee yeg yeh yei yeo yep yer yes yey yga ygc ygo yha yhc yhe yhi yhs yie yig yih yii yio yip yir yis yob yoc yoe yog yoi yoo yop yor yos yoy ypa ypg ypo yps yra yrc yre yrg yro yrp yrs ysa ysb ysc yse ysg ysi yso ysp ysr yss ysy yyb yyc yye yyg yys yyy