-er -ol -up b-p b-u bbb bbe bbl bbo bbp bbr bbt bbu bbx be- beb bee bel beo bep ber bet beu bex blb ble bll blo blp blr blt blu blx bob boe bol boo bop bor bot bou box bpb bpe bpl bpo bpp bpr bpt bpu bpx brb bre brl bro brp brr brt bru brx btb bte btl bto btp btr btt btu btx bub bue bul buo bup bur but buu bux bxb bxl bxo bxx ebb ebe ebl ebo ebp ebr ebt ebu ebx eeb eee eel eeo eep eer eet eex elb ele ell elo elp elr elt elu elx eo- eob eoe eol eoo eop eor eot eou ep- epb epe epl epo epp epr ept epu epx erb ere erl ero erp err ert eru etb ete etl eto etp etr ett etu etx eu- eub eue eul eup eur eut eux ex- exe exl exo exp exr ext exu exx l-p lbb lbe lbl lbo lbp lbr lbt lbu lbx leb lee lel leo lep ler let leu lex llb lle lll llo llp llr llt llu lob loe lol loo lop lor lot lou lox lpb lpe lpl lpo lpp lpr lpt lpu lpx lrb lro lrp lrr lrt lru ltb lte ltl lto ltp ltr ltt ltu ltx lub lue lul luo lup lur lut luu lux lxo lxr lxx ob- obb obe obl obo obp obr obt obu obx oeb oee oel oeo oep oer oet oex olb ole oll olo olp olt olu oo- oob ool ooo oop oor oot oox op- opb ope opl opo opp opr opt opx or- orb ore orl oro orp orr ort oru orx ot- otb ote otl oto otp otr ott otu ou- oue oul ouo oup our out ox- oxb oxo oxt oxx p-p pbb pbe pbl pbo pbp pbr pbt pbu pbx peb pee pel peo pep per pet peu pex plb ple pll plo plp plr plt plu plx pob poe pol poo pop por pot pou pox ppb ppe ppl ppo ppp ppr ppt ppu ppx prb pre prl pro prp prr prt pru prx pt- ptb pte ptl pto ptp ptr ptt ptu ptx pub pue pul pup pur put puu pxe pxl pxr pxt rbb rbe rbl rbo rbp rbr rbt rbu rbx re- reb ree rel reo rep rer ret reu rex rle rll rlo rlp rlr rlt rlu rob roe rol roo rop ror rot rou rox rpb rpe rpl rpo rpp rpr rpt rpu rpx rrb rrl rrp rrr rrt rru rtb rte rtl rto rtp rtr rtt rtu rtx rub rue ruo rup rur rut ruu rux rxp rxr t-x tbb tbe tbl tbo tbp tbr tbt tbu te- teb tee tel teo tep ter tet teu tex tle tll tlo tlp tlr tlt tlu tlx to- tob toe tol too top tor tot tou tox tpb tpe tpl tpo tpp tpr tpt tpu tpx trb tre trl tro trp trr trt tru trx ttb tte ttl tto ttp ttr ttt ttu ttx tub tue tul tuo tup tur tut tuu tux txe txl txt txu ubb ube ubl ubo ubp ubr ubt ubu ubx ueb uee uel uep uer uet ulb ule ull ulo ulp ulr ult ulu uob uoe uol uoo uop uor uot uox up- upb upe upo upp upr upt upu upx ur- urb ure url uro urp urr urt uru urx utb ute utl uto utp utr utt utu utx uue uur uut uuu uxb uxo uxr uxt uxu xbe xbl xbr xbx xee xel xep xer xet xeu xex xlb xlr xlt xoo xop xor xot xox xpb xpe xpl xpo xpp xpt xrt xrx xtp xtr xtx xue xul xup xxl xxo xxp xxx