-er b-u bbb bbc bbd bbe bbg bbn bbo bbr bbu bcb bcc bcd bce bcg bcn bco bcr bcu bdb bdc bdd bde bdg bdo bdr bdu be- beb bec bed bee beg ben beo ber beu bgb bgc bgd bge bgg bgn bgo bgr bgu bnb bnc bnd bne bng bnn bno bnr bnu bob boc bod boe bog bon boo bor bou brb brd bre brg brn bro brr bru bub buc bud bue bug bun buo bur buu c-- cbb cbc cbd cbe cbg cbn cbo cbr cbu ccb ccc ccd cce ccg ccn cco ccr ccu cdb cdc cdd cde cdg cdn cdo cdr cdu ce- ceb cec ced cee ceg cen ceo cer ceu cgb cgc cgd cge cgg cgn cgo cgr cgu cn- cnb cnc cnd cne cng cnn cno cnr cnu co- cob coc cod coe cog con coo cor cou crb crc crd cre crg crn cro crr cru cub cuc cud cue cug cun cuo cur cuu dbb dbc dbd dbe dbg dbn dbo dbr dbu dcb dcc dcd dce dcg dcn dco dcr dcu ddb ddc ddd dde ddg ddn ddo ddr ddu de- deb dec ded dee deg den deo der deu dgc dgd dge dgg dgn dgr dgu dnb dnc dnd dne dng dnn dno dnr dob doc dod doe dog don doo dor dou drb drc drd dre drg drn dro drr dru dub duc dud due dug dun duo dur ebb ebc ebd ebe ebg ebn ebo ebr ebu ec- ecb ecc ecd ece ecg ecn eco ecr ecu ed- edb edc edd ede edg edn edo edr edu eeb eec eed eee eeg een eeo eer egb egc egd ege egg egn ego egr egu en- enb enc end ene eng enn eno enr enu eo- eob eoc eod eoe eog eon eoo eor eou erb erc erd ere erg ern ero err eru eu- eub euc eud eue eug eun eur g-d gbc gbd gbe gbg gbn gbo gbr gbu gcb gcc gcd gce gcg gcn gco gcr gcu gdb gdc gdd gde gdn gdo gdr gdu ge- geb gec ged gee geg gen geo ger geu ggb ggc ggd ggg ggn ggo ggr ggu gnb gnc gnd gne gnn gno gnr gnu gob goc god goe gog gon goo gor gou grb grc grd gre grg grn gro grr gru gu- gub guc gud gue gug gun guo gur guu nbb nbc nbd nbe nbg nbn nbo nbr nbu ncb ncc ncd nce ncg ncn nco ncr ncu ndb ndc ndd nde ndg ndn ndo ndr ndu ne- neb nec ned nee neg nen neo ner neu ngb ngc ngd nge ngg ngn ngo ngu nnb nnc nne nng nnn nno nnu no- nob noc nod noe nog non noo nor nou nrb nrc nrd nre nrg nrn nro nrr nru nub nuc nud nue nug nun nuo nur nuu ob- obb obc obd obe obg obn obo obr obu oc- ocb occ ocd ocg ocn oco ocr ocu odb odc odd ode odg odn odo odr odu oeb oec oed oee oeg oen oeo oer ogc ogd oge ogg ogn ogo on- onb onc ond one ong onn ono onr onu oo- oob ooc ood oog oon ooo oor or- orb orc ord ore org orn oro orr oru ou- ouc oud oue oun ouo our rbb rbc rbd rbe rbg rbn rbo rbr rbu rcb rcc rcd rce rcg rcn rco rcr rcu rdb rdc rdd rde rdg rdn rdo rdr rdu re- reb rec red ree reg ren reo rer reu rgb rgc rgd rge rgg rgn rgo rgr rnb rnc rnd rng rnn rno rnr rnu rob roc rod roe rog ron roo ror rou rrb rrc rrd rrg rrn rrr rru rub ruc rud rue rug run ruo rur ruu ubb ubc ube ubg ubn ubo ubr ubu ucb ucc ucd uce ucg ucn uco ucr ucu udb udc udd ude udg udn udo udr udu ueb uec ued uee ueg uen uer ugb ugc uge ugg ugn ugo ugr ugu un- unb unc und une ung unn uno unr unu uob uoc uod uoe uog uon uoo uor ur- urb urc urd ure urg urn uro urr uru uuc uue uug uun uur uuu