-er -ic b-u bbb bbc bbd bbe bbg bbi bbr bbu bcb bcc bcd bce bcg bci bcr bcu bdb bdc bdd bde bdg bdi bdr bdu be- beb bec bed bee beg bei ber beu bgb bgc bgd bge bgg bgi bgr bgu bi- bib bic bid bie big bii bir biu brb brd bre brg bri brr bru bub buc bud bue bug bui bur buu c-- cbb cbc cbd cbe cbg cbi cbr cbu ccb ccc ccd cce ccg cci ccr ccu cdb cdc cdd cde cdg cdi cdr cdu ce- ceb cec ced cee ceg cei cer ceu cgb cgc cgd cge cgg cgi cgr cgu ci- cib cic cid cie cig cii cir ciu crb crc crd cre crg cri crr cru cub cuc cud cue cug cui cur cuu dbb dbc dbd dbe dbg dbi dbr dbu dcb dcc dcd dce dcg dci dcr dcu ddb ddc ddd dde ddg ddi ddr ddu de- deb dec ded dee deg dei der deu dgc dgd dge dgg dgi dgr dgu di- dib dic did die dig dii dir diu drb drc drd dre drg dri drr dru dub duc dud due dug dui dur ebb ebc ebd ebe ebg ebi ebr ebu ec- ecb ecc ecd ece ecg eci ecr ecu ed- edb edc edd ede edg edi edr edu eeb eec eed eee eeg eer egb egc egd ege egg egi egr egu eib eic eid eie eig eii eir eiu erb erc erd ere erg eri err eru eu- eub euc eud eue eug eui eur g-d gbc gbd gbe gbg gbi gbr gbu gcb gcc gcd gce gcg gci gcr gcu gdb gdc gdd gde gdi gdr gdu ge- geb gec ged gee geg gei ger geu ggb ggc ggd ggg ggi ggr ggu gib gic gid gie gig gii gir giu grb grc grd gre grg gri grr gru gu- gub guc gud gue gug gui gur guu i-d ibb ibc ibd ibe ibg ibi ibr ibu icb icc icd ice icg ici icr icu idb idc idd ide idg idi idr idu ie- iec ied iee ieg iei ier igb igc igd ige igg igi igr igu iib iic iid iie iii iir iiu ir- irb irc ird ire irg iri irr iru iu- iub iuc iud iue iug iui iur rbb rbc rbd rbe rbg rbi 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 rer reu rgb rgc rgd rge rgg rgi rgr rib ric rid rie rig rii rir rrb rrc rrd rrg rri rrr rru rub ruc rud rue rug rui rur ruu ubb ubc ube ubg ubi ubr ubu ucb ucc ucd uce ucg uci ucr ucu udb udc udd ude udg udi udr udu ueb uec ued uee ueg uei uer ugb ugc uge ugg ugi ugr ugu uib uic uid uie uig uii uir uiu ur- urb urc urd ure urg uri urr uru uuc uue uug uur uuu