-ol bbb bbc bbh bbl bbn bbo bbr bbs bcb bcc bch bcl bcn bco bcr bcs bhb bhc bhh bhl bho bhr bhs blb blc blh bll bln blo blr bls bnb bnc bnl bnn bno bnr bns bob boc boh bol bon boo bor bos brb brh brl brn bro brr brs bsb bsc bsh bsl bsn bso bsr bss c-- cbb cbc cbh cbl cbn cbo cbr cbs ccb ccc cch ccl ccn cco ccr ccs ch- chb chc chh chl chn cho chr chs cl- clb clc clh cll cln clo clr cls cn- cnb cnc cnh cnl cnn cno cnr cns co- cob coc coh col con coo cor cos crb crc crh crl crn cro crr crs csb csc csh csl csn cso csr css hbb hbc hbh hbl hbn hbo hbr hbs hcb hcc hch hcl hcn hco hcr hcs hhb hhc hhh hhl hhn hho hhr hhs hlb hlc hlh hll hln hlo hlr hls hnb hnc hnh hnl hnn hno hns hob hoc hoh hol hon hoo hor hos hr- hrb hrc hrh hrl hrn hro hrr hrs hsb hsc hsh hsl hsn hsr hss lbb lbc lbh lbl lbo lbr lbs lcb lcc lch lcl lcn lco lcr lcs lhb lhc lhh lho lhr lhs llb llc lll lln llo llr lls lnb lnc lnh lnl lnn lno lnr lns lob loc loh lol lon loo lor los lrb lrc lrh lrn lro lrr lrs lsb lsc lsh lsl lsn lso lsr lss nbb nbc nbl nbn nbo nbr nbs ncb ncc nch ncl ncn nco ncr ncs nhb nhc nhh nhl nhn nhr nhs nlb nlc nlh nll nln nlo nlr nls nnb nnc nnh nnl nnn nno nns no- nob noc noh nol non noo nor nos nrb nrc nrl nrn nro nrr nrs nsb nsc nsh nsl nsn nso nsr nss ob- obb obc obh obl obn obo obr obs oc- ocb occ och ocl ocn oco ocr ocs ohc ohh ohl ohn oho ohr ohs olb olc oll oln olo ols on- onb onc onh onl onn ono onr ons oo- oob ooc ooh ool oon ooo oor oos or- orb orc orh orl orn oro orr ors os- osb osc osh osl osn oso osr oss rbb rbc rbh rbl rbn rbo rbr rbs rcb rcc rch rcl rcn rco rcr rcs rh- rhb rhc rhh rhl rhn rho rhr rhs rlc rlh rll rln rlo rlr rls rnb rnc rnh rnn rno rnr rns rob roc roh rol ron roo ror ros rrb rrc rrh rrl rrn rrr rrs rsb rsc rsh rsl rsn rso rsr rss sbb sbc sbh sbl sbn sbo sbr sbs scb scc sch scl scn sco scr scs sh- shb shc shh shl shn sho shr shs slb slc slh sll sln slo slr sls snb snc snl snn sno snr sns sob soc soh sol son soo sor sos sr- srb src srh srl srn sro srr srs ss- ssb ssc ssh ssl ssn sso ssr sss