b-u bbb bbc bbd bbk bbn bbo bbr bbt bbu bby bcb bcc bcd bck bcn bco bcr bct bcu bcy bdb bdc bdd bdk bdo bdr bdt bdu bdy bkb bkc bkk bkn bko bkr bkt bnb bnc bnd bnk bnn bno bnr bnt bnu bob boc bod bok bon boo bor bot bou boy brb brd brk brn bro brr brt bru bry btb btc btd btk btn bto btr btt btu bty bub buc bud buk bun buo bur but buu buy by- byc byd byk byn byo byr byt byu c-- cbb cbc cbd cbk cbn cbo cbr cbt cbu cby ccb ccc ccd cck ccn cco ccr cct ccu cdb cdc cdd cdk cdn cdo cdr cdt cdu cdy ckb ckc ckd cko ckt cky cn- cnb cnc cnd cnn cno cnr cnt cnu cny co- cob coc cod cok con coo cor cot cou coy crb crc crd crk crn cro crr crt cru cry ctb ctc ctd ctk ctn cto ctr ctt ctu cty cub cuc cud cuk cun cuo cur cut cuu cuy cyb cyc cyd cyk cyn cyo cyr cyt dbb dbc dbd dbk dbn dbo dbr dbt dbu dby dcb dcc dcd dck dcn dco dcr dct dcu ddb ddc ddd ddk ddn ddo ddr ddt ddu ddy dkb dkc dkk dko dkr dkt dku dnb dnc dnd dnk dnn dno dnr dnt dny dob doc dod dok don doo dor dot dou doy drb drc drd drk drn dro drr drt dru dry dtb dtc dtd dtk dtn dto dtr dtt dtu dty dub duc dud duk dun duo dur dut duy dy- dyb dyc dyd dyk dyn dyo dyr dyu dyy k-t kbb kbc kbd kbk kbn kbo kbr kbu kcb kcc kcd kck kcn kcr kct kcu kdb kdc kdk kdo kdr kdt kdu kdy kkb kkc kkk kkn kkr kkt kku kky kn- knc knd knk knn kno knr knt knu kob koc kod kok kon koo kor kot kou koy krc krd krk krn kro krr krt kru kry ktb ktc ktk ktn kto ktr ktt ktu kub kuc kud kuk kun kur kut kuu kuy kyc kyd kyn kyo kyr kyt kyu nbb nbc nbd nbk nbn nbo nbr nbt nbu ncb ncc ncd nck ncn nco ncr nct ncu ndb ndc ndd ndk ndn ndo ndr ndt ndu ndy nkc nkk nkn nko nkr nkt nku nky nnb nnc nnk nnn nno nnt nnu no- nob noc nod nok non noo nor not nou noy nrb nrc nrd nrk nrn nro nrr nrt nru nry ntb ntc ntd ntk ntn nto ntr ntt ntu nub nuc nud nuk nun nuo nur nut nuu nuy nyc nyd nyk nyn nyo nyt nyu nyy ob- obb obc obd obk obn obo obr obt obu oby oc- ocb occ ocd ock ocn oco ocr oct ocu odb odc odd odn odo odr odt odu okb okc okd okk oko okr oku on- onb onc ond onk onn ono onr ont onu ony oo- oob ooc ood ook oon ooo oor oot or- orb orc ord ork orn oro orr ort oru ory ot- otb otc otd otk otn oto otr ott otu ou- ouc oud ouk oun ouo our out oyd oyo rbb rbc rbd rbk rbn rbo rbr rbt rbu rcb rcc rcd rcn rco rcr rct rcu rdb rdc rdd rdn rdo rdr rdt rdu rdy rkb rkc rkk rko rkt rku rky rnb rnc rnd rnn rno rnr rnt rnu rny rob roc rod rok ron roo ror rot rou roy rrb rrc rrd rrk rrn rrr rrt rru rtb rtc rtd rtk rtn rto rtr rtt rtu rty rub ruc rud ruk run ruo rur rut ruu ruy ry- ryc ryd ryk ryn ryo ryr ryu ryy tbb tbc tbd tbk tbn tbo tbr tbt tbu tcb tcc tcd tck tcn tco tcr tct tcu tdb tdc tdd tdk tdn tdo tdr tdt tdu tdy tkb tkc tkk tko tkr tkt tky tnb tnc tnd tnk tnn tno tnr tnt to- tob toc tod tok ton too tor tot tou toy trb trc trd trk trn tro trr trt tru try ttb ttc ttd ttk ttn tto ttr ttt ttu tty tub tuc tud tuk tun tuo tur tut tuu tuy tyc tyd tyn tyo tyr tyt ubb ubc ubk ubn ubo ubr ubt ubu uby ucb ucc ucd uck ucn uco ucr uct ucu udb udc udd udk udn udo udr udt udu ukb ukc ukk ukn ukr uku un- unb unc und unk unn uno unr unt unu uny uob uoc uod uok uon uoo uor uot ur- urb urc urd urk urn uro urr urt uru ury utb utc utd utk utn uto utr utt utu uty uuc uun uur uut uuu uyc uyo uyu ybc ybr yby ycc ycd yco ycu ycy ydn ydo ydt ydy ykk ykn ynd ynk ynn ynu yny yob yoc yod yok yon yoo yor yot you yoy yrc yrn yro yrt yru ytc ytd ytk ytn yto ytr ytt ytu yud yuk yun yuo yur yut yuu yuy yyb yyc yyt yyu yyy