oba obb obc obd obe obh obm obo obp obs obt obx oc- oca ocb occ ocd och ocm oco ocp ocs oct ocx oda odb odc odd ode odh odm odo odp ods odt oea oeb oec oed oee oeh oem oeo oep oes oet oex oha ohc ohd ohe ohh ohm oho ohp ohs oht om- oma omb omc omd ome omh omm omo omp oms omt omx oo- ooa oob ooc ood ooh oom ooo oop oos oot oox op- opa opb opc opd ope oph opm opo opp ops opt opx os- osa osb osc osd ose osh osm oso osp oss ost osx ot- ota otb otc otd ote oth otm oto otp ots ott ox- oxa oxb oxc oxo oxt oxx p-p paa pab pac pad pae pah pam pao pap pas pat pax pba pbb pbc pbd pbe pbm pbo pbp pbs pbt pbx pca pcb pcc pcd pce pch pcm pco pcp pcs pct pcx pda pdb pdc pdd pde pdh pdm pdo pdp pds pdt pdx pea peb pec ped pee peh pem peo pep pes pet pex pha phb phc phd phe phm pho php phs pht phx pma pmb pmc pmd pme pmh pmm pmo pmp pms pmt pmx poa pob poc pod poe poh pom poo pop pos pot pox ppa ppb ppc ppd ppe pph ppm ppo ppp pps ppt ppx ps- psa psb psc psd pse psh psm pso psp pss pst psx pt- pta ptb ptc ptd pte pth ptm pto ptp pts ptt ptx pxc pxe pxm pxs pxt saa sab sac sad sae sah sam sao sap sas sat sax sba sbb sbc sbd sbe sbh sbm sbo sbp sbs sbt sbx sca scb scc scd sce sch scm sco scp scs sct scx sda sdb sdc sdd sde sdh sdm sdo sdp sds sdt se- sea seb sec sed see seh sem seo sep ses set sex sh- sha shb shc shd she shh shm sho shp shs sht sma smb smc smd sme smh smm smo smp sms smt smx soa sob soc sod soe soh som soo sop sos sot sox spa spb spc spd spe sph spm spo spp sps spt spx ss- ssa ssb ssc ssd sse ssh ssm sso ssp sss sst ssx sta stb stc std ste sth stm sto stp sts stt stx sxc sxm sxs sxt t-x taa tab tac tad tae tah tam tao tap tas tat tax tba tbb tbc tbd tbe tbh tbm tbo tbp tbs tbt tca tcb tcc tcd tce tch tcm tco tcp tcs tct tcx tda tdb tdc tdd tde tdh tdm tdo tdp tds tdt tdx te- tea teb tec ted tee teh tem teo tep tes tet tex th- tha thb thc thd the thh thm tho thp ths tht thx tma tmb tmc tmd tme tmh tmm tmo tmp tms tmt tmx to- toa tob toc tod toe toh tom too top tos tot tox tpa tpb tpc tpd tpe tph tpm tpo tpp tps tpt tpx tsa tsb tsc tsd tse tsh tsm tso tsp tss tst tsx tta ttb ttc ttd tte tth ttm tto ttp tts ttt ttx txe txs txt xaa xac xad xam xap xas xat xbc xbe xbx xcb xcd xch xcp xcx xda xdb xdc xde xdh xdm xds xdt xed xee xem xep xes xet xex xhd xhp xht xma xmc xmd xmh xmm xmo xmp xms xmt xmx xoa xoc xod xom xoo xop xos xot xox xpa xpb xpc xpd xpe xpm xpo xpp xps xpt xsa xsb xsc xsm xsp xss xst xtc xtm xtp xts xtx xxo xxp xxx