-er -ol bbb bbc bbe bbl bbo bbr bcb bcc bce bcl bco bcr bcz be- beb bec bee bel beo ber bez blb blc ble bll blo blr blz bob boc boe bol boo bor boz brb bre brl bro brr brz bze bzo bzr bzz c-- cbb cbc cbe cbl cbo cbr cbz ccb ccc cce ccl cco ccr ccz ce- ceb cec cee cel ceo cer cez cl- clb clc cle cll clo clr clz co- cob coc coe col coo cor coz crb crc cre crl cro crr crz cz- czc cze czo ebb ebc ebe ebl ebo ebr ec- ecb ecc ece ecl eco ecr eeb eec eee eel eeo eer elb elc ele ell elo elr elz eo- eob eoc eoe eol eoo eor erb erc ere erl ero err erz eze ezo ezr ezz lbb lbc lbe lbl lbo lbr lcb lcc lce lcl lco lcr leb lec lee lel leo ler lez llb llc lle lll llo llr llz lob loc loe lol loo lor loz lrb lrc lro lrr lrz lzo lzr ob- obb obc obe obl obo obr oc- ocb occ ocl oco ocr ocz oeb oec oee oel oeo oer olb olc ole oll olo oo- oob ooc ool ooo oor or- orb orc ore orl oro orr orz oze ozo ozz rbb rbc rbe rbl rbo rbr rcb rcc rce rcl rco rcr re- reb rec ree rel reo rer rez rlc rle rll rlo rlr rob roc roe rol roo ror roz rrb rrc rrl rrr rzb rze rzo zbb zbc zbl zbr zce zcl zco zeb zec zee zel zeo zer zez zlr zo- zob zoc zoe zol zoo zor zrl zro zzr zzz