oba obb obc obe obi obl obn obo obp obt obu obx oc- oca ocb occ oci ocl ocn oco ocp oct ocu ocx oea oeb oec oee oei oel oen oeo oep oet oex oia oib oic oie oii oil oin oio oip oit oiu ola olb olc ole oli oll oln olo olp olt olu on- ona onb onc one oni onl onn ono onp ont onu onx oo- ooa oob ooc ooi ool oon ooo oop oot oox op- opa opb opc ope opi opl opn opo opp opt opx ot- ota otb otc ote oti otl otn oto otp ott otu ou- oua ouc oue oui oul oun ouo oup out ox- oxa oxb oxc oxi oxn oxo oxt oxx p-p paa pab pac pae pai pal pan pao pap pat pau pax pba pbb pbc pbe pbi pbl pbn pbo pbp pbt pbu pbx pca pcb pcc pce pci pcl pcn pco pcp pct pcu pcx pea peb pec pee pei pel pen peo pep pet peu pex pia pib pic pie pii pil pin pio pip pit piu pix pla plb plc ple pli pll pln plo plp plt plu plx pn- pna pnb pnc pne pni pnl pnn pno pnp pnt pnu pnx poa pob poc poe poi pol pon poo pop pot pou pox ppa ppb ppc ppe ppi ppl ppn ppo ppp ppt ppu ppx pt- pta ptb ptc pte pti ptl ptn pto ptp ptt ptu ptx pua pub puc pue pui pul pun pup put puu pxc pxe pxl pxt t-x taa tab tac tae tai tal tan tao tap tat tau tax tba tbb tbc tbe tbi tbl tbn tbo tbp tbt tbu tca tcb tcc tce tci tcl tcn tco tcp tct tcu tcx te- tea teb tec tee tei tel ten teo tep tet teu tex tia tib tic tie tii til tin tio tip tit tiu tix tla tlc tle tli tll tln tlo tlp tlt tlu tlx tna tnb tnc tne tni tnl tnn tno tnp tnt tnx to- toa tob toc toe toi tol ton too top tot tou tox tpa tpb tpc tpe tpi tpl tpn tpo tpp tpt tpu tpx tta ttb ttc tte tti ttl ttn tto ttp ttt ttu ttx tua tub tuc tue tui tul tun tuo tup tut tuu tux txe txi txl txn txt txu ua- uaa uab uac uae uai ual uan uao uap uat uau uba ubb ubc ube ubi ubl ubn ubo ubp ubt ubu ubx uca ucb ucc uce uci ucl ucn uco ucp uct ucu uea ueb uec uee uei uel uen uep uet uia uib uic uie uii uil uin uio uip uit uiu ula ulb ulc ule uli ull uln ulo ulp ult ulu un- una unb unc une uni unl unn uno unp unt unu unx uoa uob uoc uoe uol uon uoo uop uot uox up- upa upb upc upe upi upn upo upp upt upu upx uta utb utc ute uti utl utn uto utp utt utu utx uua uuc uue uun uut uuu uxb uxc uxo uxt uxu xaa xac xal xan xap xat xau xbc xbe xbl xbx xcb xci xcl xcp xcx xee xel xen xep xet xeu xex xia xic xie xii xin xio xit xiu xix xla xlb xli xlt xna xnc xno xnu xoa xoc xoi xon xoo xop xot xox xpa xpb xpc xpe xpl xpn xpo xpp xpt xtc xti xtp xtx xue xui xul xun xup xxi xxl xxo xxp xxx