-er -ic b-u bbb bbc bbd bbe bbg bbi bbk bbr bbu bcb bcc bcd bce bcg bci bck bcr bcu bdb bdc bdd bde bdg bdi bdk bdr bdu be- beb bec bed bee beg bei bek ber beu bgb bgc bgd bge bgg bgi bgk bgr bgu bi- bib bic bid bie big bii bik bir biu bkb bkc bke bkg bkk bkr brb brd bre brg bri brk brr bru bub buc bud bue bug bui buk bur buu c-- cbb cbc cbd cbe cbg cbi cbk cbr cbu ccb ccc ccd cce ccg cci cck ccr ccu cdb cdc cdd cde cdg cdi cdk cdr cdu ce- ceb cec ced cee ceg cei cek cer ceu cgb cgc cgd cge cgg cgi cgr cgu ci- cib cic cid cie cig cii cik cir ciu ckb ckc ckd cki crb crc crd cre crg cri crk crr cru cub cuc cud cue cug cui cuk cur cuu dbb dbc dbd dbe dbg dbi dbk dbr dbu dcb dcc dcd dce dcg dci dck dcr dcu ddb ddc ddd dde ddg ddi ddk ddr ddu de- deb dec ded dee deg dei dek der deu dgc dgd dge dgg dgi dgk dgr dgu di- dib dic did die dig dii dik dir diu dkb dkc dke dkg dki dkk dkr dku drb drc drd dre drg dri drk drr dru dub duc dud due dug dui duk dur ebb ebc ebd ebe ebg ebi ebk ebr ebu ec- ecb ecc ecd ece ecg eci eck ecr ecu ed- edb edc edd ede edg edi edk edr edu eeb eec eed eee eeg eek eer egb egc egd ege egg egi egr egu eib eic eid eie eig eii eik eir eiu ekb ekc ekd eke ekg eki ekr eku erb erc erd ere erg eri erk err eru eu- eub euc eud eue eug eui eur g-d gbc gbd gbe gbg gbi gbk gbr gbu gcb gcc gcd gce gcg gci gck gcr gcu gdb gdc gdd gde gdi gdk gdr gdu ge- geb gec ged gee geg gei gek ger geu ggb ggc ggd ggg ggi ggr ggu gib gic gid gie gig gii gik gir giu gkb gkd grb grc grd gre grg gri grk grr gru gu- gub guc gud gue gug gui guk gur guu i-d ibb ibc ibd ibe ibg ibi ibk ibr ibu icb icc icd ice icg ici ick icr icu idb idc idd ide idg idi idk idr idu ie- iec ied iee ieg iei iek ier igb igc igd ige igg igi igk igr igu iib iic iid iie iii iir iiu ikb ikc ike iki ikk ikr iku ir- irb irc ird ire irg iri irk irr iru iu- iub iuc iud iue iug iui iur kbb kbc kbd kbe kbi kbk kbr kbu kcb kcc kcd kce kcg kci kck kcr kcu kdb kdc kde kdg kdk kdr kdu ke- keb kec ked kee keg kei kek ker kgb kgc kgd kgi kgu kib kic kid kie kig kii kik kir kiu kkb kkc kke kki kkk kkr kku krc krd krg kri krk krr kru kub kuc kud kue kug kui kuk kur kuu rbb rbc rbd rbe rbg rbi rbk rbr rbu rcb rcc rcd rce rcg rci rcr rcu rdb rdc rdd rde rdg rdi rdr rdu re- reb rec red ree reg rei rek rer reu rgb rgc rgd rge rgg rgi rgk rgr rib ric rid rie rig rii rik rir rkb rkc rke rkg rkk rku rrb rrc rrd rrg rri rrk rrr rru rub ruc rud rue rug rui ruk rur ruu ubb ubc ube ubg ubi ubk ubr ubu ucb ucc ucd uce ucg uci uck ucr ucu udb udc udd ude udg udi udk udr udu ueb uec ued uee ueg uei uer ugb ugc uge ugg ugi ugk ugr ugu uib uic uid uie uig uii uir uiu ukb ukc uke uki ukk ukr uku ur- urb urc urd ure urg uri urk urr uru uuc uue uug uur uuu