bbb bbc bbd bbh bbo bbr bbs bcb bcc bcd bch bco bcr bcs bdb bdc bdd bdh bdo bdr bds bhb bhc bhd bhh bho bhr bhs bob boc bod boh boo bor bos brb brd brh bro brr brs bsb bsc bsd bsh bso bsr bss c-- cbb cbc cbd cbh cbo cbr cbs ccb ccc ccd cch cco ccr ccs cdb cdc cdd cdh cdo cdr cds ch- chb chc chd chh cho chr chs co- cob coc cod coh coo cor cos crb crc crd crh cro crr crs csb csc csd csh cso csr css dbb dbc dbd dbh dbo dbr dbs dcb dcc dcd dco dcr dcs ddb ddc ddd ddh ddo ddr dds dh- dhb dhc dhd dhh dho dhr dhs dob doc dod doh doo dor dos drb drc drd dro drr drs dsb dsc dsd dsh dso dsr dss hbb hbc hbd hbh hbo hbr hbs hcb hcc hcd hch hco hcr hcs hdb hdc hdd hdh hdo hdr hds hhb hhc hhd hhh hho hhr hhs hob hoc hod hoh hoo hor hos hr- hrb hrc hrd hrh hro hrr hrs hsb hsc hsd hsh hsr hss ob- obb obc obd obh obo obr obs oc- ocb occ ocd och oco ocr ocs odb odc odd odh odo odr ods ohc ohd ohh oho ohr ohs oo- oob ooc ood ooh ooo oor oos or- orb orc ord orh oro orr ors os- osb osc osd osh oso osr oss rbb rbc rbd rbh rbo rbr rbs rcb rcc rcd rch rco rcr rcs rdb rdc rdd rdh rdo rdr rds rh- rhb rhc rhd rhh rho rhr rhs rob roc rod roh roo ror ros rrb rrc rrd rrh rrr rrs rsb rsc rsd rsh rso rsr rss sbb sbc sbd sbh sbo sbr sbs scb scc scd sch sco scr scs sdb sdc sdd sdh sdo sdr sds sh- shb shc shd shh sho shr shs sob soc sod soh soo sor sos sr- srb src srd srh sro srr srs ss- ssb ssc ssd ssh sso ssr sss