-th a-a a-c a-t aaa aac aah aao aap aas aat aax ac- aca acc ach aco acp acs act acx aha ahc ahh aho ahp ahs aht ahx aoa aoc aoh aoo aop aos aot aox ap- apa apc aph apo app aps apt apx as- asa asc ash aso asp ass ast asx at- ata atc ath ato atp ats att atx ax- axa axh axo axp axs axt axx c-- caa cac cah cao cap cas cat cax cca ccc cch cco ccp ccs cct ccx ch- cha chc chh cho chp chs cht chx co- coa coc coh coo cop cos cot cox cpa cpc cph cpo cpp cps cpt cpx csa csc csh cso csp css cst csx cta ctc cth cto ctp cts ctt ctx cxc cxh cxo cxp cxs cxt cxx haa hac hah hao hap has hat hax hca hcc hch hco hcp hcs hct hha hhc hhh hho hhp hhs hht hoa hoc hoh hoo hop hos hot hox hpa hpc hph hpo hpp hps hpt hsa hsc hsh hsp hss hst hsx hta htc hth hto htp hts htt htx hxc oaa oac oah oao oap oas oat oax oc- oca occ och oco ocp ocs oct ocx oha ohc ohh oho ohp ohs oht oo- ooa ooc ooh ooo oop oos oot oox op- opa opc oph opo opp ops opt opx os- osa osc osh oso osp oss ost osx ot- ota otc oth oto otp ots ott ox- oxa oxc oxo oxt oxx p-p paa pac pah pao pap pas pat pax pca pcc pch pco pcp pcs pct pcx pha phc pho php phs pht phx poa poc poh poo pop pos pot pox ppa ppc pph ppo ppp pps ppt ppx ps- psa psc psh pso psp pss pst psx pt- pta ptc pth pto ptp pts ptt ptx pxc pxs pxt saa sac sah sao sap sas sat sax sca scc sch sco scp scs sct scx sh- sha shc shh sho shp shs sht soa soc soh soo sop sos sot sox spa spc sph spo spp sps spt spx ss- ssa ssc ssh sso ssp sss sst ssx sta stc sth sto stp sts stt stx sxc sxs sxt t-x taa tac tah tao tap tas tat tax tca tcc tch tco tcp tcs tct tcx th- tha thc thh tho thp ths tht thx to- toa toc toh too top tos tot tox tpa tpc tph tpo tpp tps tpt tpx tsa tsc tsh tso tsp tss tst tsx tta ttc tth tto ttp tts ttt ttx txs txt xaa xac xap xas xat xch xcp xcx xhp xht xoa xoc xoo xop xos xot xox xpa xpc xpo xpp xps xpt xsa xsc xsp xss xst xtc xtp xts xtx xxo xxp xxx