-er b-u bbb bbc bbe bbg bbk bbn bbo bbr bbt bbu bcb bcc bce bcg bck bcn bco bcr bct bcu bcz be- beb bec bee beg bek ben beo ber bet beu bez bgb bgc bge bgg bgk bgn bgo bgr bgt bgu bgz bkb bkc bke bkg bkk bkn bko bkr bkt bnb bnc bne bng bnk bnn bno bnr bnt bnu bnz bob boc boe bog bok bon boo bor bot bou boz brb bre brg brk brn bro brr brt bru brz btb btc bte btg btk btn bto btr btt btu btz bub buc bue bug buk bun buo bur but buu buz bze bzn bzo bzr bzu bzz c-- cbb cbc cbe cbg cbk cbn cbo cbr cbt cbu cbz ccb ccc cce ccg cck ccn cco ccr cct ccu ccz ce- ceb cec cee ceg cek cen ceo cer cet ceu cez cgb cgc cge cgg cgn cgo cgr cgt cgu ckb ckc cko ckt cn- cnb cnc cne cng cnn cno cnr cnt cnu co- cob coc coe cog cok con coo cor cot cou coz crb crc cre crg crk crn cro crr crt cru crz ctb ctc cte ctg ctk ctn cto ctr ctt ctu ctz cub cuc cue cug cuk cun cuo cur cut cuu cuz cz- czc cze czk czo czt ebb ebc ebe ebg ebk ebn ebo ebr ebt ebu ec- ecb ecc ece ecg eck ecn eco ecr ect ecu eeb eec eee eeg eek een eeo eer eet egb egc ege egg egn ego egr egt egu ekb ekc eke ekg eko ekr ekt eku en- enb enc ene eng enk enn eno enr ent enu enz eo- eob eoc eoe eog eok eon eoo eor eot eou erb erc ere erg erk ern ero err ert eru erz etb etc ete etg etk etn eto etr ett etu etz eu- eub euc eue eug eun eur eut eze ezo ezr ezz gbc gbe gbg gbk gbn gbo gbr gbt gbu gbz gcb gcc gce gcg gck gcn gco gcr gct gcu ge- geb gec gee geg gek gen geo ger get geu gez ggb ggc ggg ggn ggo ggr ggt ggu ggz gkb gkn gko gkt gnb gnc gne gnn gno gnr gnt gnu gob goc goe gog gok gon goo gor got gou goz grb grc gre grg grk grn gro grr grt gru gtb gtc gte gtg gtk gtn gto gtr gtt gtu gu- gub guc gue gug guk gun guo gur gut guu guz gzo gzr gzu k-t k-z kbb kbc kbe kbk kbn kbo kbr kbu kbz kcb kcc kce kcg kck kcn kcr kct kcu ke- keb kec kee keg kek ken keo ker ket kez kgb kgc kgo kgu kkb kkc kke kkk kkn kkr kkt kku kn- knc kne kng knk knn kno knr knt knu kob koc koe kog kok kon koo kor kot kou koz krc krg krk krn kro krr krt kru ktb ktc kte ktg ktk ktn kto ktr ktt ktu kub kuc kue kug kuk kun kur kut kuu kzo nbb nbc nbe nbg nbk nbn nbo nbr nbt nbu ncb ncc nce ncg nck ncn nco ncr nct ncu ne- neb nec nee neg nek nen neo ner net neu nez ngb ngc nge ngg ngk ngn ngo ngt ngu nkc nke nkk nkn nko nkr nkt nku nnb nnc nne nng nnk nnn nno nnt nnu nnz no- nob noc noe nog nok non noo nor not nou noz nrb nrc nre nrg nrk nrn nro nrr nrt nru nrz ntb ntc nte ntg ntk ntn nto ntr ntt ntu ntz nub nuc nue nug nuk nun nuo nur nut nuu nzb nze nzg nzo nzz ob- obb obc obe obg obk obn obo obr obt obu oc- ocb occ ocg ock ocn oco ocr oct ocu ocz oeb oec oee oeg oen oeo oer oet ogc oge ogg ogn ogo ogt okb okc oke okg okk oko okr oku on- onb onc one ong onk onn ono onr ont onu oo- oob ooc oog ook oon ooo oor oot or- orb orc ore org ork orn oro orr ort oru orz ot- otb otc ote otg otk otn oto otr ott otu otz ou- ouc oue ouk oun ouo our out oze ozo ozt ozu ozz rbb rbc rbe rbg rbk rbn rbo rbr rbt rbu rcb rcc rce rcg rcn rco rcr rct rcu re- reb rec ree reg rek ren reo rer ret reu rez rgb rgc rge rgg rgk rgn rgo rgr rgt rkb rkc rke rkg rkk rko rkt rku rkz rnb rnc rng rnn rno rnr rnt rnu rnz rob roc roe rog rok ron roo ror rot rou roz rrb rrc rrg rrk rrn rrr rrt rru rtb rtc rte rtg rtk rtn rto rtr rtt rtu rtz rub ruc rue rug ruk run ruo rur rut ruu ruz rzb rze rzo tbb tbc tbe tbg tbk tbn tbo tbr tbt tbu tbz tcb tcc tce tcg tck tcn tco tcr tct tcu te- teb tec tee teg tek ten teo ter tet teu tez tgb tgc tge tgg tgk tgn tgo tgr tgt tgu tgz tkb tkc tke tkg tkk tko tkr tkt tkz tnb tnc tne tng tnk tnn tno tnr tnt tnz to- tob toc toe tog tok ton too tor tot tou toz trb trc tre trg trk trn tro trr trt tru trz ttb ttc tte ttg ttk ttn tto ttr ttt ttu tub tuc tue tug tuk tun tuo tur tut tuu tuz tze tzu ubb ubc ube ubg ubk ubn ubo ubr ubt ubu ucb ucc uce ucg uck ucn uco ucr uct ucu ueb uec uee ueg uen uer uet ugb ugc uge ugg ugk ugn ugo ugr ugt ugu ukb ukc uke ukk ukn ukr uku ukz un- unb unc une ung unk unn uno unr unt unu uob uoc uoe uog uok