-er -ol bbb bbc bbd bbe bbl bbo bbr bcb bcc bcd bce bcl bco bcr bdb bdc bdd bde bdl bdo bdr be- beb bec bed bee bel beo ber blb blc bld ble bll blo blr bob boc bod boe bol boo bor brb brd bre brl bro brr c-- cbb cbc cbd cbe cbl cbo cbr ccb ccc ccd cce ccl cco ccr cdb cdc cdd cde cdl cdo cdr ce- ceb cec ced cee cel ceo cer cl- clb clc cld cle cll clo clr co- cob coc cod coe col coo cor crb crc crd cre crl cro crr dbb dbc dbd dbe dbl dbo dbr dcb dcc dcd dce dcl dco dcr ddb ddc ddd dde ddl ddo ddr de- deb dec ded dee del deo der dl- dlb dlc dld dle dll dlo dlr dob doc dod doe dol doo dor drb drc drd dre drl dro drr ebb ebc ebd ebe ebl ebo ebr ec- ecb ecc ecd ece ecl eco ecr ed- edb edc edd ede edl edo edr eeb eec eed eee eel eeo eer elb elc eld ele ell elo elr eo- eob eoc eod eoe eol eoo eor erb erc erd ere erl ero err lbb lbc lbd lbe lbl lbo lbr lcb lcc lcd lce lcl lco lcr ldb ldc ldd lde ldl ldo ldr leb lec led lee lel leo ler llb llc lld lle lll llo llr lob loc lod loe lol loo lor lrb lrc lrd lro lrr ob- obb obc obd obe obl obo obr oc- ocb occ ocd ocl oco ocr odb odc odd ode odl odo odr oeb oec oed oee oel oeo oer olb olc old ole oll olo oo- oob ooc ood ool ooo oor or- orb orc ord ore orl oro orr rbb rbc rbd rbe rbl rbo rbr rcb rcc rcd rce rcl rco rcr rdb rdc rdd rde rdl rdo rdr re- reb rec red ree rel reo rer rlc rld rle rll rlo rlr rob roc rod roe rol roo ror rrb rrc rrd rrl rrr