-er -ol b-u bbb bbd bbe bbl bbo bbr bbt bbu bdb bdd bde bdl bdo bdr bdt bdu bdv be- beb bed bee bel beo ber bet beu bev blb bld ble bll blo blr blt blu blv bob bod boe bol boo bor bot bou bov brb brd bre brl bro brr brt bru brv btb btd bte btl bto btr btt btu btv bub bud bue bul buo bur but buu bvb bvd bve bvl bvo bvr bvt bvu bvv dbb dbd dbe dbl dbo dbr dbt dbu dbv ddb ddd dde ddl ddo ddr ddt ddu de- deb ded dee del deo der det deu dev dl- dlb dld dle dll dlo dlr dlt dlu dlv dob dod doe dol doo dor dot dou dov drb drd dre drl dro drr drt dru drv dtb dtd dte dtl dto dtr dtt dtu dtv dub dud due dul duo dur dut duv dvb dvd dve dvl dvr dvt dvu ebb ebd ebe ebl ebo ebr ebt ebu ebv ed- edb edd ede edl edo edr edt edu eeb eed eee eel eeo eer eet eev elb eld ele ell elo elr elt elu elv eo- eob eod eoe eol eoo eor eot eou erb erd ere erl ero err ert eru erv etb etd ete etl eto etr ett etu etv eu- eub eud eue eul eur eut euv evb evd eve evl evo evr evt evv lbb lbd lbe lbl lbo lbr lbt lbu lbv ldb ldd lde ldl ldo ldr ldt ldu ldv leb led lee lel leo ler let leu lev llb lld lle lll llo llr llt llu llv lob lod loe lol loo lor lot lou lov lrb lrd lro lrr lrt lru lrv ltb ltd lte ltl lto ltr ltt ltu ltv lub lud lue lul luo lur lut luu luv lvb lvd lve lvl lvr lvt lvv ob- obb obd obe obl obo obr obt obu obv odb odd ode odl odo odr odt odu odv oeb oed oee oel oeo oer oet olb old ole oll olo olt olu oo- oob ood ool ooo oor oot oov or- orb ord ore orl oro orr ort oru orv ot- otb otd ote otl oto otr ott otu otv ou- oud oue oul ouo our out ov- ovb ovd ove ovl ovo ovv rbb rbd rbe rbl rbo rbr rbt rbu rdb rdd rde rdl rdo rdr rdt rdu rdv re- reb red ree rel reo rer ret reu rev rld rle rll rlo rlr rlt rlu rob rod roe rol roo ror rot rou rov rrb rrd rrl rrr rrt rru rtb rtd rte rtl rto rtr rtt rtu rtv rub rud rue ruo rur rut ruu ruv rvb rvd rve rvl rvo rvr rvt rvu rvv tbb tbd tbe tbl tbo tbr tbt tbu tbv tdb tdd tde tdl tdo tdr tdt tdu tdv te- teb ted tee tel teo ter tet teu tev tld tle tll tlo tlr tlt tlu tlv to- tob tod toe tol too tor tot tou tov trb trd tre trl tro trr trt tru trv ttb ttd tte ttl tto ttr ttt ttu ttv tub tud tue tul tuo tur tut tuu tuv tvb tvd tve tvl tvo tvr tvt tvu ubb ube ubl ubo ubr ubt ubu ubv udb udd ude udl udo udr udt udu udv ueb ued uee uel uer uet ulb uld ule ull ulo ulr ult ulu ulv uob uod uoe uol uoo uor uot ur- urb urd ure url uro urr urt uru utb utd ute utl uto utr utt utu utv uue uur uut uuu uvb uve uvl uvo uvu uvv v-e vbd vbl vbo vbr vbv vdb vdd vde vdl vdo vdr vdt vdu vdv veb ved vee vel veo ver vet veu vl- vlb vld vle vll vlo vlt vlv vob vod voe vol voo vor vot vou vov vrb vrd vre vrr vrt vru vtb vte vtl vto vtr vtt vtu vtv vue vul vur vut vuv vvb vvo vvr vvt vvv