rdt rdu re- reb rec red ree reg rei ren reo rer ret reu rgb rgc rgd rge rgg rgi rgn rgo rgr rgt rib ric rid rie rig rii rin rio rir rit rnb rnc rnd rng rni rnn rno rnr rnt rnu rob roc rod roe rog roi ron roo ror rot rou rrb rrc rrd rrg rri rrn rrr rrt rru rtb rtc rtd rte rtg rti rtn rto rtr rtt rtu rub ruc rud rue rug rui run ruo rur rut ruu tbb tbc tbd tbe tbg tbi tbn tbo tbr tbt tbu tcb tcc tcd tce tcg tci tcn tco tcr tct tcu tdb tdc tdd tde tdg tdi tdn tdo tdr tdt tdu te- teb tec ted tee teg tei ten teo ter tet teu tgb tgc tge tgg tgi tgn tgo tgr tgt tgu tib tic tid tie tig tii tin tio tir tit tiu tnb tnc tnd tne tng tni tnn tno tnr tnt to- tob toc tod toe tog toi ton too tor tot tou trb trc trd tre trg tri trn tro trr trt tru ttb ttc ttd tte ttg tti ttn tto ttr ttt ttu tub tuc tud tue tug tui tun tuo tur tut tuu ubb ubc ube ubg ubi ubn ubo ubr ubt ubu ucb ucc ucd uce ucg uci ucn uco ucr uct ucu udb udc udd ude udg udi udn udo udr udt udu ueb uec ued uee ueg uei uen uer uet ugb ugc uge ugg ugi ugn ugo ugr ugt ugu uib uic uid uie uig uii uin uio uir uit uiu un- unb unc und une ung uni unn uno unr unt unu uob uoc uod uoe uog uon uoo uor uot ur- urb urc urd ure urg uri urn uro urr urt uru utb utc utd ute uti utn uto utr utt utu uuc uue uug uun uur uut uuu