rna rnc rng rni rnm rnn rno rnr rnt roa roc roe rog roi rom ron roo ror rot rox rra rrc rrg rri rrm rrn rrr rrt rta rtc rte rtg rti rtm rtn rto rtr rtt rtx rxr t-x taa tac tae tag tai tam tan tao tar tat tax tca tcc tce tcg tci tcm tcn tco tcr tct tcx te- tea tec tee teg tei tem ten teo ter tet tex tga tgc tge tgg tgi tgm tgn tgo tgr tgt tia tic tie tig tii tim tin tio tir tit tix tma tmc tme tmg tmi tmm tmn tmo tmr tmt tmx tna tnc tne tng tni tnm tnn tno tnr tnt tnx to- toa toc toe tog toi tom ton too tor tot tox tra trc tre trg tri trm trn tro trr trt trx tta ttc tte ttg tti ttm ttn tto ttr ttt ttx txe txi txn txt xaa xac xag xam xan xar xat xci xcr xcx xee xeg xem xen xer xet xex xge xgi xia xic xie xii xin xio xit xix xma xmc xmg xmi xmm xmo xmr xmt xmx xna xnc xno xoa xoc xog xoi xom xon xoo xor xot xox xrc xrt xrx xtc xti xtm xtr xtx xxi xxo xxx