-ic bbb bbc bbh bbi bbo bbr bbs bby bcb bcc bch bci bco bcr bcs bcy bhb bhc bhh bhi bho bhr bhs bi- bib bic bih bii bio bir bis biy bob boc boh boi boo bor bos boy brb brh bri bro brr brs bry bsb bsc bsh bsi bso bsr bss bsy by- byc byh byi byo byr bys c-- cbb cbc cbh cbi cbo cbr cbs cby ccb ccc cch cci cco ccr ccs ch- chb chc chh chi cho chr chs chy ci- cib cic cih cii cio cir cis co- cob coc coh coi coo cor cos coy crb crc crh cri cro crr crs cry csb csc csh csi cso csr css csy cyb cyc cyo cyr cys h-i hbb hbc hbh hbi hbo hbr hbs hby hcb hcc hch hci hco hcr hcs hcy hhb hhc hhh hhi hho hhr hhs hhy hib hic hih hii hio hir his hob hoc hoh hoi hoo hor hos hoy hr- hrb hrc hrh hri hro hrr hrs hsb hsc hsh hsi hsr hss hsy hy- hyb hyc hyh hyi hyo hyr hys hyy ibb ibc ibh ibi ibo ibr ibs iby icb icc ich ici ico icr ics icy ihb ihc ihh ihi iho ihr ihs ihy iib iic iih iii iio iir iis io- iob ioc ioh ioi ioo ior ios ir- irb irc iri iro irr irs iry is- isb isc ish isi iso isr iss isy iyc iyo iyr iys iyy o-i ob- obb obc obh obi obo obr obs oby oc- ocb occ och oci oco ocr ocs ohc ohh ohi oho ohr ohs oib oic oii oio oir ois oo- oob ooc ooh ooi ooo oor oos or- orb orc orh ori oro orr ors ory os- osb osc osh osi oso osr oss oyi oyo oys rbb rbc rbh rbi rbo rbr rbs rcb rcc rch rci rco rcr rcs rh- rhb rhc rhh rhi rho rhr rhs rib ric rih rii rio rir ris riy rob roc roh roi roo ror ros roy rrb rrc rrh rri rrr rrs rsb rsc rsh rsi rso rsr rss ry- ryc ryo ryr rys ryy sbb sbc sbh sbi sbo sbr sbs sby scb scc sch sci sco scr scs sh- shb shc shh shi sho shr shs shy sib sic sih sii sio sir sis sob soc soh soi soo sor sos soy sr- srb src srh sri sro srr srs sry ss- ssb ssc ssh ssi sso ssr sss sy- syb syc syh syi syr sys ybc ybi ybr ybs yby ycc ych yci yco ycs ycy yhc yhi yhs yih yii yio yir yis yob yoc yoi yoo yor yos yoy yrc yro yrs ysb ysc ysi yso ysr yss ysy yyb yyc yys yyy