-ic b-u bbb bbc bbf bbi bbk bbs bbt bbu bby bcb bcc bcf bci bck bcs bct bcu bcy bfb bfc bff bfi bfs bft bfu bfy bi- bib bic bif bii bik bis bit biu biy bkb bkc bkf bkk bks bkt bsb bsc bsf bsi bsk bss bst bsu bsy btb btc btf bti btk bts btt btu bty bub buc buf bui buk bus but buu buy by- byc byf byi byk bys byt byu c-- cbb cbc cbf cbi cbk cbs cbt cbu cby ccb ccc ccf cci cck ccs cct ccu cfb cfc cff cfi cfk cfs cft cfu ci- cib cic cif cii cik cis cit ciu ckb ckc cki cks ckt cky csb csc csf csi csk css cst csu csy ctb ctc ctf cti ctk cts ctt ctu cty cub cuc cuf cui cuk cus cut cuu cuy cyb cyc cyf cyk cys cyt fbb fbc fbf fbi fbk fbs fbt fbu fcb fcc fcf fci fck fcs fct fcu fcy ffc fff ffi ffk ffs fft ffu ffy fib fic fif fii fik fis fit fiu fkb fkc fkf fki fkk fkt fsb fsc fsf fsi fsk fss fst fsu ftb ftc ftf fti ftk fts ftt ftu fty fub fuf fui fuk fus fut fuu fy- fyb fyc fyi fyk i-f ibb ibc ibf ibi ibk ibs ibt ibu iby icb icc icf ici ick ics ict icu icy ifb ifc iff ifi ifs ift ifu ify iib iic iif iii iis iit iiu ikb ikc ikf iki ikk iks ikt iku is- isb isc isf isi isk iss ist isu isy itb itc itf iti itk its itt itu ity iu- iub iuc iui ius iut iyc iys iyt iyy k-t kbb kbc kbf kbi kbk kbs kbu kcb kcc kci kck kcs kct kcu kfc kff kfi kfs kfu kib kic kif kii kik kis kit kiu kkb kkc kki kkk kks kkt kku kky ksb ksc ksf ksi ksk kss kst ksu ktb ktc ktf ktk kts ktt ktu kub kuc kui kuk kus kut kuu kuy kyc kys kyt kyu sbb sbc sbf sbi sbk sbs sbt sbu sby scb scc scf sci sck scs sct scu sfb sfc sff sfi sfk sfs sft sfu sib sic sif sii sik sis sit siu sk- skb skc skf ski skk sks skt sku sky ss- ssb ssc ssf ssi ssk sss sst ssu stb stc stf sti stk sts stt stu sty sub suc suf sui suk sus sut suu suy sy- syb syc syi syk sys syt syu tbb tbc tbf tbi tbk tbs tbt tbu tcb tcc tcf tci tck tcs tct tcu tfb tfc tff tfi tfk tfs tft tfu tib tic tif tii tik tis tit tiu tiy tkb tkc tkk tks tkt tky tsb tsc tsf tsi tsk tss tst tsu tsy ttb ttc ttf tti ttk tts ttt ttu tty tub tuc tuf tui tuk tus tut tuu tuy tyc tyf tys tyt ubb ubc ubf ubi ubk ubs ubt ubu uby ucb ucc ucf uci uck ucs uct ucu ufc uff ufi ufs uft ufu uib uic uif uii uis uit uiu ukb ukc ukf uki ukk uku usb usc usf usi usk uss ust usu utb utc utf uti utk uts utt utu uty uuc uus uut uuu uyc uyi uys uyu ybc ybf ybi ybs yby ycc ycf yci ycs ycu ycy yfc yff yfs yft yfu yif yii yis yit yki ykk ysb ysc ysi ysk yss yst ysu ysy ytc ytf ytk yts ytt ytu yui yuk yus yut yuu yuy yyb yyc yyf yys yyt yyu yyy