-er -ol bbb bbc bbe bbh bbl bbn bbo bbr bcb bcc bce bch bcl bcn bco bcr be- beb bec bee beh bel ben beo ber bhb bhc bhe bhh bhl bho bhr blb blc ble blh bll bln blo blr bnb bnc bne bnl bnn bno bnr bob boc boe boh bol bon boo bor brb bre brh brl brn bro brr c-- cbb cbc cbe cbh cbl cbn cbo cbr ccb ccc cce cch ccl ccn cco ccr ce- ceb cec cee ceh cel cen ceo cer ch- chb chc che chh chl chn cho chr cl- clb clc cle clh cll cln clo clr cn- cnb cnc cne cnh cnl cnn cno cnr co- cob coc coe coh col con coo cor crb crc cre crh crl crn cro crr ebb ebc ebe ebh ebl ebn ebo ebr ec- ecb ecc ece ech ecl ecn eco ecr eeb eec eee eel een eeo eer ehb ehc ehe ehh ehl ehn eho ehr elb elc ele elh ell eln elo elr en- enb enc ene enh enl enn eno enr eo- eob eoc eoe eoh eol eon eoo eor erb erc ere erh erl ern ero err hbb hbc hbe hbh hbl hbn hbo hbr hcb hcc hce hch hcl hcn hco hcr he- heb hec hee heh hel hen heo her hhb hhc hhe hhh hhl hhn hho hhr hlb hlc hle hlh hll hln hlo hlr hnb hnc hne hnh hnl hnn hno hob hoc hoe hoh hol hon hoo hor hr- hrb hrc hre hrh hrl hrn hro hrr lbb lbc lbe lbh lbl lbo lbr lcb lcc lce lch lcl lcn lco lcr leb lec lee leh lel len leo ler lhb lhc lhh lho lhr llb llc lle lll lln llo llr lnb lnc lne lnh lnl lnn lno lnr lob loc loe loh lol lon loo lor lrb lrc lrh lrn lro lrr nbb nbc nbe nbl nbn nbo nbr ncb ncc nce nch ncl ncn nco ncr ne- neb nec nee neh nel nen neo ner nhb nhc nhe nhh nhl nhn nhr nlb nlc nle nlh nll nln nlo nlr nnb nnc nne nnh nnl nnn nno no- nob noc noe noh nol non noo nor nrb nrc nre nrl nrn nro nrr ob- obb obc obe obh obl obn obo obr oc- ocb occ och ocl ocn oco ocr oeb oec oee oeh oel oen oeo oer ohc ohe ohh ohl ohn oho ohr olb olc ole oll oln olo on- onb onc one onh onl onn ono onr oo- oob ooc ooh ool oon ooo oor or- orb orc ore orh orl orn oro orr rbb rbc rbe rbh rbl rbn rbo rbr rcb rcc rce rch rcl rcn rco rcr re- reb rec ree reh rel ren reo rer rh- rhb rhc rhe rhh rhl rhn rho rhr rlc rle rlh rll rln rlo rlr rnb rnc rnh rnn rno rnr rob roc roe roh rol ron roo ror rrb rrc rrh rrl rrn rrr