b-u bbb bbc bbg bbk bbn bbo bbs bbu bby bcb bcc bcg bck bcn bco bcs bcu bcy bgb bgc bgg bgk bgn bgo bgs bgu bkb bkc bkg bkk bkn bko bks bnb bnc bng bnk bnn bno bns bnu bob boc bog bok bon boo bos bou boy bsb bsc bsg bsk bsn bso bss bsu bsy bub buc bug buk bun buo bus buu buy by- byc byg byk byn byo bys byu c-- cbb cbc cbg cbk cbn cbo cbs cbu cby ccb ccc ccg cck ccn cco ccs ccu cgb cgc cgg cgn cgo cgs cgu cgy ckb ckc cko cks cky cn- cnb cnc cng cnn cno cns cnu cny co- cob coc cog cok con coo cos cou coy csb csc csg csk csn cso css csu csy cub cuc cug cuk cun cuo cus cuu cuy cyb cyc cyg cyk cyn cyo cys gbc gbg gbk gbn gbo gbs gbu gby gcb gcc gcg gck gcn gco gcs gcu ggb ggc ggg ggn ggo ggs ggu gkb gkn gko gks gnb gnc gnn gno gns gnu gob goc gog gok gon goo gos gou goy gsb gsc gsg gsk gsn gso gss gsu gu- gub guc gug guk gun guo gus guu guy gy- gyb gyn gyo gys kbb kbc kbk kbn kbo kbs kbu kcb kcc kcg kck kcn kcs kcu kgb kgc kgo kgs kgu kgy kkb kkc kkk kkn kks kku kky kn- knc kng knk knn kno knu kob koc kog kok kon koo kos kou koy ksb ksc ksg ksk ksn kso kss ksu kub kuc kug kuk kun kus kuu kuy kyc kyn kyo kys kyu nbb nbc nbg nbk nbn nbo nbs nbu ncb ncc ncg nck ncn nco ncs ncu ngb ngc ngg ngk ngn ngo ngs ngu nkc nkk nkn nko nks nku nky nnb nnc nng nnk nnn nno nns nnu no- nob noc nog nok non noo nos nou noy nsb nsc nsg nsk nsn nso nss nsu nsy nub nuc nug nuk nun nuo nus nuu nuy nyc nyg nyk nyn nyo nys nyu nyy ob- obb obc obg obk obn obo obs obu oby oc- ocb occ ocg ock ocn oco ocs ocu ogc ogg ogn ogo ogs ogy okb okc okg okk oko oks oku on- onb onc ong onk onn ono ons onu ony oo- oob ooc oog ook oon ooo oos os- osb osc osg osk osn oso oss osu ou- ouc ouk oun ouo ous oyo oys sbb sbc sbg sbk sbn sbo sbs sbu sby scb scc scg sck scn sco scs scu sgb sgc sgg sgk sgn sgo sgs sgu sk- skb skc skg skk sko sks sku sky snb snc sng snk snn sno sns snu sny sob soc sog sok son soo sos sou soy ss- ssb ssc ssg ssk ssn sso sss ssu sub suc sug suk sun suo sus suu suy sy- syb syc syg syk syn sys syu ubb ubc ubg ubk ubn ubo ubs ubu uby ucb ucc ucg uck ucn uco ucs ucu ugb ugc ugg ugk ugn ugo ugs ugu ukb ukc ukk ukn uku un- unb unc ung unk unn uno uns unu uny uob uoc uog uok uon uoo uos usb usc usg usk usn uso uss usu uuc uug uun uus uuu uyc uyo uys uyu ybc ybg ybs yby ycc yco ycs ycu ycy ygc ygo ykk ykn yng ynk ynn yns ynu yny yob yoc yog yok yon yoo yos you yoy ysb ysc ysg ysk yso yss ysu ysy yug yuk yun yuo yus yuu yuy yyb yyc yyg yys yyu yyy