oia oib oic oid oii oik oim oin oio oit oiu oka okb okc okd oki okk oko oku om- oma omb omc omd omi omm omn omo omt omu on- ona onb onc ond oni onk onn ono ont onu oo- ooa oob ooc ood ooi ook oom oon ooo oot ot- ota otb otc otd oti otk otm otn oto ott otu ou- oua ouc oud oui ouk oum oun ouo out taa tab tac tad tai tak tam tan tao tat tau tba tbb tbc tbd tbi tbk tbm tbn tbo tbt tbu tca tcb tcc tcd tci tck tcm tcn tco tct tcu tda tdb tdc tdd tdi tdk tdm tdn tdo tdt tdu tia tib tic tid tii tik tim tin tio tit tiu tka tkb tkc tkk tkm tko tkt tma tmb tmc tmd tmi tmk tmm tmn tmo tmt tmu tna tnb tnc tnd tni tnk tnm tnn tno tnt to- toa tob toc tod toi tok tom ton too tot tou tta ttb ttc ttd tti ttk ttm ttn tto ttt ttu tua tub tuc tud tui tuk tum tun tuo tut tuu ua- uaa uab uac uad uai uak uam uan uao uat uau uba ubb ubc ubi ubk ubn ubo ubt ubu uca ucb ucc ucd uci uck ucm ucn uco uct ucu uda udb udc udd udi udk udm udn udo udt udu uia uib uic uid uii uim uin uio uit uiu uka ukb ukc uki ukk ukn uku um- uma umb umc umd umi umm umn umo umt umu un- una unb unc und uni unk unm unn uno unt unu uoa uob uoc uod uok uom uon uoo uot uta utb utc utd uti utk utm utn uto utt utu uua uuc uum uun uut uuu