-er b-u bbb bbc bbd bbe bbn bbo bbq bbr bbu bcb bcc bcd bce bcn bco bcq bcr bcu bdb bdc bdd bde bdo bdq bdr bdu be- beb bec bed bee ben beo beq ber beu bnb bnc bnd bne bnn bno bnr bnu bob boc bod boe bon boo boq bor bou bqc bqd bqe brb brd bre brn bro brq brr bru bub buc bud bue bun buo bur buu c-- cbb cbc cbd cbe cbn cbo cbq cbr cbu ccb ccc ccd cce ccn cco ccr ccu cdb cdc cdd cde cdn cdo cdq cdr cdu ce- ceb cec ced cee cen ceo ceq cer ceu cn- cnb cnc cnd cne cnn cno cnr cnu co- cob coc cod coe con coo coq cor cou cqb cqc cqd cqo crb crc crd cre crn cro crq crr cru cub cuc cud cue cun cuo cuq cur cuu dbb dbc dbd dbe dbn dbo dbq dbr dbu dcb dcc dcd dce dcn dco dcr dcu ddb ddc ddd dde ddn ddo ddq ddr ddu de- deb dec ded dee den deo deq der deu dnb dnc dnd dne dnn dno dnq dnr dob doc dod doe don doo doq dor dou dqe dqn drb drc drd dre drn dro drq drr dru dub duc dud due dun duo dur ebb ebc ebd ebe ebn ebo ebq ebr ebu ec- ecb ecc ecd ece ecn eco ecq ecr ecu ed- edb edc edd ede edn edo edr edu eeb eec eed eee een eeo eer en- enb enc end ene enn eno enr enu eo- eob eoc eod eoe eon eoo eoq eor eou eqe eqn eqq equ erb erc erd ere ern ero erq err eru eu- eub euc eud eue eun eur nbb nbc nbd nbe nbn nbo nbr nbu ncb ncc ncd nce ncn nco ncr ncu ndb ndc ndd nde ndn ndo ndr ndu ne- neb nec ned nee nen neo ner neu nnb nnc nne nnn nno nnu no- nob noc nod noe non noo nor nou nqc nrb nrc nrd nre nrn nro nrr nru nub nuc nud nue nun nuo nuq nur nuu ob- obb obc obd obe obn obo obr obu oc- ocb occ ocd ocn oco ocr ocu odb odc odd ode odn odo odr odu oeb oec oed oee oen oeo oer on- onb onc ond one onn ono onr onu oo- oob ooc ood oon ooo oor oqb oqo or- orb orc ord ore orn oro orr oru ou- ouc oud oue oun ouo our qbc qbd qbe qbq qcc qcd qco qdb qdr qec qed qee qen qeo qnb qnd qne qoo qor qqq qqu qrb qrc qre qru qu- qud que quo qur rbb rbc rbd rbe rbn rbo rbr rbu rcb rcc rcd rce rcn rco rcr rcu rdb rdc rdd rde rdn rdo rdr rdu re- reb rec red ree ren reo req rer reu rnb rnc rnd rnn rno rnr rnu rob roc rod roe ron roo ror rou rqc rqn rrb rrc rrd rrn rrq rrr rru rub ruc rud rue run ruo rur ruu ubb ubc ube ubn ubo ubr ubu ucb ucc ucd uce ucn uco ucr ucu udb udc udd ude udn udo udr udu ueb uec ued uee uen uer un- unb unc und une unn uno unq unr unu uob uoc uod uoe uon uoo uor ur- urb urc urd ure urn uro urr uru uuc uue uun uur uuu