rct rcu re- reb rec ree rei rel ren reo rep rer ret reu rib ric rie rii ril rin rio rip rir rit rlc rle rli rll rln rlo rlp rlr rlt rlu rnb rnc rni rnn rno rnp rnr rnt rnu rob roc roe roi rol ron roo rop ror rot rou rpb rpc rpe rpi rpl rpn rpo rpp rpr rpt rpu rrb rrc rri rrl rrn rrp rrr rrt rru rtb rtc rte rti rtl rtn rto rtp rtr rtt rtu rub ruc rue rui run ruo rup rur rut ruu tbb tbc tbe tbi tbl tbn tbo tbp tbr tbt tbu tcb tcc tce tci tcl tcn tco tcp tcr tct tcu te- teb tec tee tei tel ten teo tep ter tet teu tib tic tie tii til tin tio tip tir tit tiu tlc tle tli tll tln tlo tlp tlr tlt tlu tnb tnc tne tni tnl tnn tno tnp tnr tnt to- tob toc toe toi tol ton too top tor tot tou tpb tpc tpe tpi tpl tpn tpo tpp tpr tpt tpu trb trc tre tri trl trn tro trp trr trt tru ttb ttc tte tti ttl ttn tto ttp ttr ttt ttu tub tuc tue tui tul tun tuo tup tur tut tuu ubb ubc ube ubi ubl ubn ubo ubp ubr ubt ubu ucb ucc uce uci ucl ucn uco ucp ucr uct ucu ueb uec uee uei uel uen uep uer uet uib uic uie uii uil uin uio uip uir uit uiu ulb ulc ule uli ull uln ulo ulp ulr ult ulu un- unb unc une uni unl unn uno unp unr unt unu uob uoc uoe uol uon uoo uop uor uot up- upb upc upe upi upn upo upp upr upt upu ur- urb urc ure uri url urn uro urp urr urt uru utb utc ute uti utl utn uto utp utr utt utu uuc uue uun uur uut uuu