-er -ol bbb bbd bbe bbl bbo bbr bbt bbx bdb bdd bde bdl bdo bdr bdt bdx be- beb bed bee bel beo ber bet bex blb bld ble bll blo blr blt blx bob bod boe bol boo bor bot box brb brd bre brl bro brr brt brx btb btd bte btl bto btr btt btx bxb bxd bxl bxo bxx dbb dbd dbe dbl dbo dbr dbt dbx ddb ddd dde ddl ddo ddr ddt ddx de- deb ded dee del deo der det dex dl- dlb dld dle dll dlo dlr dlt dlx dob dod doe dol doo dor dot dox drb drd dre drl dro drr drt drx dtb dtd dte dtl dto dtr dtt dtx dxd dxl dxo dxr dxt dxx ebb ebd ebe ebl ebo ebr ebt ebx ed- edb edd ede edl edo edr edt edx eeb eed eee eel eeo eer eet eex elb eld ele ell elo elr elt elx eo- eob eod eoe eol eoo eor eot erb erd ere erl ero err ert etb etd ete etl eto etr ett etx ex- exd exe exl exo exr ext exx lbb lbd lbe lbl lbo lbr lbt lbx ldb ldd lde ldl ldo ldr ldt leb led lee lel leo ler let lex llb lld lle lll llo llr llt lob lod loe lol loo lor lot lox lrb lrd lro lrr lrt ltb ltd lte ltl lto ltr ltt ltx lxd lxo lxr lxx ob- obb obd obe obl obo obr obt obx odb odd ode odl odo odr odt oeb oed oee oel oeo oer oet oex olb old ole oll olo olt oo- oob ood ool ooo oor oot oox or- orb ord ore orl oro orr ort orx ot- otb otd ote otl oto otr ott ox- oxb oxo oxt oxx rbb rbd rbe rbl rbo rbr rbt rbx rdb rdd rde rdl rdo rdr rdt rdx re- reb red ree rel reo rer ret rex rld rle rll rlo rlr rlt rob rod roe rol roo ror rot rox rrb rrd rrl rrr rrt rtb rtd rte rtl rto rtr rtt rtx rxr t-x tbb tbd tbe tbl tbo tbr tbt tdb tdd tde tdl tdo tdr tdt tdx te- teb ted tee tel teo ter tet tex tld tle tll tlo tlr tlt tlx to- tob tod toe tol too tor tot tox trb trd tre trl tro trr trt trx ttb ttd tte ttl tto ttr ttt ttx txe txl txt xbe xbl xbr xbx xdb xde xdr xdt xed xee xel xer xet xex xlb xld xlr xlt xod xoo xor xot xox xrd xrt xrx xtr xtx xxl xxo xxx