-er -ic b-u bbb bbc bbe bbg bbi bbl bbr bbt bbu bcb bcc bce bcg bci bcl bcr bct bcu be- beb bec bee beg bei bel ber bet beu bgb bgc bge bgg bgi bgl bgr bgt bgu bi- bib bic bie big bii bil bir bit biu blb blc ble blg bli bll blr blt blu brb bre brg bri brl brr brt bru btb btc bte btg bti btl btr btt btu bub buc bue bug bui bul bur but buu c-- cbb cbc cbe cbg cbi cbl cbr cbt cbu ccb ccc cce ccg cci ccl ccr cct ccu ce- ceb cec cee ceg cei cel cer cet ceu cgb cgc cge cgg cgi cgl cgr cgt cgu ci- cib cic cie cig cii cil cir cit ciu cl- clb clc cle clg cli cll clr clt clu crb crc cre crg cri crl crr crt cru ctb ctc cte ctg cti ctl ctr ctt ctu cub cuc cue cug cui cul cur cut cuu ebb ebc ebe ebg ebi ebl ebr ebt ebu ec- ecb ecc ece ecg eci ecl ecr ect ecu eeb eec eee eeg eel eer eet egb egc ege egg egi egl egr egt egu eib eic eie eig eii eil eir eit eiu elb elc ele elg eli ell elr elt elu erb erc ere erg eri erl err ert eru etb etc ete etg eti etl etr ett etu eu- eub euc eue eug eui eul eur eut gbc gbe gbg gbi gbl gbr gbt gbu gcb gcc gce gcg gci gcl gcr gct gcu ge- geb gec gee geg gei gel ger get geu ggb ggc ggg ggi ggr ggt ggu gib gic gie gig gii gil gir git giu glb glc gle glg gli gll glr glt glu grb grc gre grg gri grl grr grt gru gtb gtc gte gtg gti gtl gtr gtt gtu gu- gub guc gue gug gui gul gur gut guu ibb ibc ibe ibg ibi ibl ibr ibt ibu icb icc ice icg ici icl icr ict icu ie- iec iee ieg iei iel ier iet igb igc ige igg igi igl igr igt igu iib iic iie iii iil iir iit iiu il- ilb ilc ile ilg ili ill ilr ilt ilu ir- irb irc ire irg iri irl irr irt iru itb itc ite itg iti itl itt itu iu- iub iuc iue iug iui iur iut lbb lbc lbe lbg lbi lbl lbr lbt lbu lcb lcc lce lcg lci lcl lcr lct lcu leb lec lee leg lei lel ler let leu lgb lgc lge lgg lgi lgl lgr lgt lgu lib lic lie lig lii lil lir lit liu llb llc lle llg lli lll llr llt llu lrb lrc lrg lri lrr lrt lru ltb ltc lte ltg lti ltl ltr ltt ltu lub luc lue lug lui lul lur lut luu rbb rbc rbe rbg rbi rbl rbr rbt rbu rcb rcc rce rcg rci rcl rcr rct rcu re- reb rec ree reg rei rel rer ret reu rgb rgc rge rgg rgi rgr rgt rib ric rie rig rii ril rir rit rlc rle rlg rli rll rlr rlt rlu rrb rrc rrg rri rrl rrr rrt rru rtb rtc rte rtg rti rtl rtr rtt rtu rub ruc rue rug rui rur rut ruu tbb tbc tbe tbg tbi tbl tbr tbt tbu tcb tcc tce tcg tci tcl tcr tct tcu te- teb tec tee teg tei tel ter tet teu tgb tgc tge tgg tgi tgl tgr tgt tgu tib tic tie tig tii til tir tit tiu tlc tle tlg tli tll tlr tlt tlu trb trc tre trg tri trl trr trt tru ttb ttc tte ttg tti ttl ttr ttt ttu tub tuc tue tug tui tul tur tut tuu ubb ubc ube ubg ubi ubl ubr ubt ubu ucb ucc uce ucg uci ucl ucr uct ucu ueb uec uee ueg uei uel uer uet ugb ugc uge ugg ugi ugl ugr ugt ugu uib uic uie uig uii uil uir uit uiu ulb ulc ule ulg uli ull ulr ult ulu ur- urb urc ure urg uri url urr urt uru utb utc ute uti utl utr utt utu uuc uue uug uur uut uuu