-al a-a a-b a-t aaa aab aad aal aan aar aat aau ab- aba abb abd abl abn abr abt abu ad- ada adb add adl adn adr adt adu al- ala alb ald all aln alr alt alu an- ana anb and anl ann anr ant anu ar- ara arb ard arl arn arr art aru at- ata atb atd atl atn atr att atu au- aua aub aud aul aun aur aut b-u baa bab bad bal ban bar bat bau bba bbb bbd bbl bbn bbr bbt bbu bda bdb bdd bdl bdr bdt bdu bla blb bld bll bln blr blt blu bna bnb bnd bnl bnn bnr bnt bnu bra brb brd brl brn brr brt bru bta btb btd btl btn btr btt btu bua bub bud bul bun bur but buu daa dab dad dal dan dar dat dau dba dbb dbd dbl dbn dbr dbt dbu dda ddb ddd ddl ddn ddr ddt ddu dl- dla dlb dld dll dlr dlt dlu dna dnb dnd dnl dnn dnr dnt dra drb drd drl drn drr drt dru dta dtb dtd dtl dtn dtr dtt dtu dua dub dud dul dun dur dut la- laa lab lad lal lan lar lat lau lba lbb lbd lbl lbr lbt lbu lda ldb ldd ldl ldn ldr ldt ldu lla llb lld lll lln llr llt llu lna lnb lnd lnl lnn lnr lnt lnu lra lrb lrd lrn lrr lrt lru lta ltb ltd ltl ltr ltt ltu lua lub lud lul lun lur lut luu naa nab nad nal nan nar nat nau nba nbb nbd nbl nbn nbr nbt nbu nda ndb ndd ndl ndn ndr ndt ndu nla nlb nld nll nln nlr nlt nlu nna nnb nnl nnn nnt nnu nra nrb nrd nrl nrn nrr nrt nru nta ntb ntd ntn ntr ntt ntu nua nub nud nul nun nur nut nuu ra- raa rab rad ral ran rar rat rau rba rbb rbd rbl rbn rbr rbt rbu rda rdb rdd rdl rdn rdr rdt rdu rla rld rll rln rlr rlt rlu rna rnb rnd rnn rnr rnt rnu rra rrb rrd rrl rrn rrr rrt rru rta rtb rtd rtl rtn rtr rtt rtu rua rub rud run rur rut ruu taa tab tad tal tan tar tat tau tba tbb tbd tbl tbn tbr tbt tbu tda tdb tdd tdl tdn tdr tdt tdu tla tld tll tln tlr tlt tlu tna tnb tnd tnl tnn tnr tnt tra trb trd trl trn trr trt tru tta ttb ttd ttl ttn ttr ttt ttu tua tub tud tul tun tur tut tuu ua- uaa uab uad ual uan uar uat uau uba ubb ubl ubn ubr ubt ubu uda udb udd udl udn udr udt udu ula ulb uld ull uln ulr ult ulu un- una unb und unl unn unr unt unu ur- ura urb urd url urn urr urt uru uta utb utd utl utn utr utt utu uua uun uur uut uuu