-er -ol bbb bbc bbe bbl bbn bbo bbr bcb bcc bce bcl bcn bco bcr be- beb bec bee bel ben beo ber blb blc ble bll bln blo blr bnb bnc bne bnl bnn bno bnr bob boc boe bol bon boo bor brb bre brl brn bro brr c-- cbb cbc cbe cbl cbn cbo cbr ccb ccc cce ccl ccn cco ccr ce- ceb cec cee cel cen ceo cer cl- clb clc cle cll cln clo clr cn- cnb cnc cne cnl cnn cno cnr co- cob coc coe col con coo cor crb crc cre crl crn cro crr ebb ebc ebe ebl ebn ebo ebr ec- ecb ecc ece ecl ecn eco ecr eeb eec eee eel een eeo eer elb elc ele ell eln elo elr en- enb enc ene enl enn eno enr eo- eob eoc eoe eol eon eoo eor erb erc ere erl ern ero err lbb lbc lbe lbl lbo lbr lcb lcc lce lcl lcn lco lcr leb lec lee lel len leo ler llb llc lle lll lln llo llr lnb lnc lne lnl lnn lno lnr lob loc loe lol lon loo lor lrb lrc lrn lro lrr nbb nbc nbe nbl nbn nbo nbr ncb ncc nce ncl ncn nco ncr ne- neb nec nee nel nen neo ner nlb nlc nle nll nln nlo nlr nnb nnc nne nnl nnn nno no- nob noc noe nol non noo nor nrb nrc nre nrl nrn nro nrr ob- obb obc obe obl obn obo obr oc- ocb occ ocl ocn oco ocr oeb oec oee oel oen oeo oer olb olc ole oll oln olo on- onb onc one onl onn ono onr oo- oob ooc ool oon ooo oor or- orb orc ore orl orn oro orr rbb rbc rbe rbl rbn rbo rbr rcb rcc rce rcl rcn rco rcr re- reb rec ree rel ren reo rer rlc rle rll rln rlo rlr rnb rnc rnn rno rnr rob roc roe rol ron roo ror rrb rrc rrl rrn rrr