rec red ree rek rel reo rer ret reu rkb rkc rke rkk rko rkt rku rla rlc rld rle rll rlo rlr rlt rlu roa rob roc rod roe rok rol roo ror rot rou rra rrb rrc rrd rrk rrl rrr rrt rru rta rtb rtc rtd rte rtk rtl rto rtr rtt rtu rua rub ruc rud rue ruk ruo rur rut ruu taa tab tac tad tae tak tal tao tar tat tau tba tbb tbc tbd tbe tbk tbl tbo tbr tbt tbu tca tcb tcc tcd tce tck tcl tco tcr tct tcu tda tdb tdc tdd tde tdk tdl tdo tdr tdt tdu te- tea teb tec ted tee tek tel teo ter tet teu tka tkb tkc tke tkk tkl tko tkr tkt tla tlc tld tle tlk tll tlo tlr tlt tlu to- toa tob toc tod toe tok tol too tor tot tou tra trb trc trd tre trk trl tro trr trt tru tta ttb ttc ttd tte ttk ttl tto ttr ttt ttu tua tub tuc tud tue tuk tul tuo tur tut tuu ua- uaa uab uac uad uae uak ual uao uar uat uau uba ubb ubc ube ubk ubl ubo ubr ubt ubu uca ucb ucc ucd uce uck ucl uco ucr uct ucu uda udb udc udd ude udk udl udo udr udt udu uea ueb uec ued uee uel uer uet uka ukb ukc uke ukk ukl ukr uku ula ulb ulc uld ule ulk ull ulo ulr ult ulu uoa uob uoc uod uoe uok uol uoo uor uot ur- ura urb urc urd ure urk url uro urr urt uru uta utb utc utd ute utk utl uto utr utt utu uua uuc uue uur uut uuu