-er -ol bbb bbc bbd bbe bbl bbo bbr bbt bcb bcc bcd bce bcl bco bcr bct bdb bdc bdd bde bdl bdo bdr bdt be- beb bec bed bee bel beo ber bet blb blc bld ble bll blo blr blt bob boc bod boe bol boo bor bot brb brd bre brl bro brr brt btb btc btd bte btl bto btr btt c-- cbb cbc cbd cbe cbl cbo cbr cbt ccb ccc ccd cce ccl cco ccr cct cdb cdc cdd cde cdl cdo cdr cdt ce- ceb cec ced cee cel ceo cer cet cl- clb clc cld cle cll clo clr clt co- cob coc cod coe col coo cor cot crb crc crd cre crl cro crr crt ctb ctc ctd cte ctl cto ctr ctt dbb dbc dbd dbe dbl dbo dbr dbt dcb dcc dcd dce dcl dco dcr dct ddb ddc ddd dde ddl ddo ddr ddt de- deb dec ded dee del deo der det dl- dlb dlc dld dle dll dlo dlr dlt dob doc dod doe dol doo dor dot drb drc drd dre drl dro drr drt dtb dtc dtd dte dtl dto dtr dtt ebb ebc ebd ebe ebl ebo ebr ebt ec- ecb ecc ecd ece ecl eco ecr ect ed- edb edc edd ede edl edo edr edt eeb eec eed eee eel eeo eer eet elb elc eld ele ell elo elr elt eo- eob eoc eod eoe eol eoo eor eot erb erc erd ere erl ero err ert etb etc etd ete etl eto etr ett lbb lbc lbd lbe lbl lbo lbr lbt lcb lcc lcd lce lcl lco lcr lct ldb ldc ldd lde ldl ldo ldr ldt leb lec led lee lel leo ler let llb llc lld lle lll llo llr llt lob loc lod loe lol loo lor lot lrb lrc lrd lro lrr lrt ltb ltc ltd lte ltl lto ltr ltt ob- obb obc obd obe obl obo obr obt oc- ocb occ ocd ocl oco ocr oct odb odc odd ode odl odo odr odt oeb oec oed oee oel oeo oer oet olb olc old ole oll olo olt oo- oob ooc ood ool ooo oor oot or- orb orc ord ore orl oro orr ort ot- otb otc otd ote otl oto otr ott rbb rbc rbd rbe rbl rbo rbr rbt rcb rcc rcd rce rcl rco rcr rct rdb rdc rdd rde rdl rdo rdr rdt re- reb rec red ree rel reo rer ret rlc rld rle rll rlo rlr rlt rob roc rod roe rol roo ror rot rrb rrc rrd rrl rrr rrt rtb rtc rtd rte rtl rto rtr rtt tbb tbc tbd tbe tbl tbo tbr tbt tcb tcc tcd tce tcl tco tcr tct tdb tdc tdd tde tdl tdo tdr tdt te- teb tec ted tee tel teo ter tet tlc tld tle tll tlo tlr tlt to- tob toc tod toe tol too tor tot trb trc trd tre trl tro trr trt ttb ttc ttd tte ttl tto ttr ttt