-ic b-u bbb bbc bbi bbo bbr bbs bbt bbu bby bcb bcc bci bco bcr bcs bct bcu bcy bi- bib bic bii bio bir bis bit biu biy bob boc boi boo bor bos bot bou boy brb bri bro brr brs brt bru bry bsb bsc bsi bso bsr bss bst bsu bsy btb btc bti bto btr bts btt btu bty bub buc bui buo bur bus but buu buy by- byc byi byo byr bys byt byu c-- cbb cbc cbi cbo cbr cbs cbt cbu cby ccb ccc cci cco ccr ccs cct ccu ci- cib cic cii cio cir cis cit ciu co- cob coc coi coo cor cos cot cou coy crb crc cri cro crr crs crt cru cry csb csc csi cso csr css cst csu csy ctb ctc cti cto ctr cts ctt ctu cty cub cuc cui cuo cur cus cut cuu cuy cyb cyc cyo cyr cys cyt ibb ibc ibi ibo ibr ibs ibt ibu iby icb icc ici ico icr ics ict icu icy iib iic iii iio iir iis iit iiu io- iob ioc ioi ioo ior ios iot iou ir- irb irc iri iro irr irs irt iru iry is- isb isc isi iso isr iss ist isu isy itb itc iti ito its itt itu ity iu- iub iuc iui iur ius iut iyc iyo iyr iys iyt iyy o-i ob- obb obc obi obo obr obs obt obu oby oc- ocb occ oci oco ocr ocs oct ocu oib oic oii oio oir ois oit oiu oo- oob ooc ooi ooo oor oos oot or- orb orc ori oro orr ors ort oru ory os- osb osc osi oso osr oss ost osu ot- otb otc oti oto otr ots ott otu ou- ouc oui ouo our ous out oyi oyo oys rbb rbc rbi rbo rbr rbs rbt rbu rcb rcc rci rco rcr rcs rct rcu rib ric rii rio rir ris rit riy rob roc roi roo ror ros rot rou roy rrb rrc rri rrr rrs rrt rru rsb rsc rsi rso rsr rss rst rsu rtb rtc rti rto rtr rts rtt rtu rty rub ruc rui ruo rur rus rut ruu ruy ry- ryc ryo ryr rys ryu ryy sbb sbc sbi sbo sbr sbs sbt sbu sby scb scc sci sco scr scs sct scu sib sic sii sio sir sis sit siu sob soc soi soo sor sos sot sou soy sr- srb src sri sro srr srs srt sry ss- ssb ssc ssi sso ssr sss sst ssu stb stc sti sto str sts stt stu sty sub suc sui suo sur sus sut suu suy sy- syb syc syi syr sys syt syu tbb tbc tbi tbo tbr tbs tbt tbu tcb tcc tci tco tcr tcs tct tcu tib tic tii tio tir tis tit tiu tiy to- tob toc toi too tor tos tot tou toy trb trc tri tro trr trs trt tru try tsb tsc tsi tso tsr tss tst tsu tsy ttb ttc tti tto ttr tts ttt ttu tty tub tuc tui tuo tur tus tut tuu tuy tyc tyo tyr tys tyt ubb ubc ubi ubo ubr ubs ubt ubu uby ucb ucc uci uco ucr ucs uct ucu uib uic uii uio uir uis uit uiu uob uoc uoo uor uos uot ur- urb urc uri uro urr urs urt uru ury usb usc usi uso usr uss ust usu utb utc uti uto utr uts utt utu uty uuc uur uus uut uuu uyc uyi uyo uys uyu ybc ybi ybr ybs yby ycc yci yco ycs ycu ycy yii yio yir yis yit yob yoc yoi yoo yor yos yot you yoy yrc yro yrs yrt yru ysb ysc ysi yso ysr yss yst ysu ysy ytc yto ytr yts ytt ytu yui yuo yur yus yut yuu yuy yyb yyc yys yyt yyu yyy