-al -er a-a a-b a-c aaa aab aac aad aae aal aan aar aau ab- aba abb abc abd abe abl abn abr abu ac- aca acb acc acd ace acl acn acr acu ad- ada adb adc add ade adl adn adr adu aea aeb aec aed aee ael aen aer aeu al- ala alb alc ald ale all aln alr alu an- ana anb anc and ane anl ann anr anu ar- ara arb arc ard are arl arn arr aru au- aua aub auc aud aue aul aun aur b-u baa bab bac bad bae bal ban bar bau bba bbb bbc bbd bbe bbl bbn bbr bbu bca bcb bcc bcd bce bcl bcn bcr bcu bda bdb bdc bdd bde bdl bdr bdu be- bea beb bec bed bee bel ben ber beu bla blb blc bld ble bll bln blr blu bna bnb bnc bnd bne bnl bnn bnr bnu bra brb brd bre brl brn brr bru bua bub buc bud bue bul bun bur buu c-- caa cab cac cad cae cal can car cau cba cbb cbc cbd cbe cbl cbn cbr cbu cca ccb ccc ccd cce ccl ccn ccr ccu cda cdb cdc cdd cde cdl cdn cdr cdu ce- cea ceb cec ced cee cel cen cer ceu cl- cla clb clc cld cle cll cln clr clu cn- cna cnb cnc cnd cne cnl cnn cnr cnu cra crb crc crd cre crl crn crr cru cua cub cuc cud cue cul cun cur cuu daa dab dac dad dae dal dan dar dau dba dbb dbc dbd dbe dbl dbn dbr dbu dca dcb dcc dcd dce dcl dcn dcr dcu dda ddb ddc ddd dde ddl ddn ddr ddu de- dea deb dec ded dee del den der deu dl- dla dlb dlc dld dle dll dlr dlu dna dnb dnc dnd dne dnl dnn dnr dra drb drc drd dre drl drn drr dru dua dub duc dud due dul dun dur eaa eab eac ead eae eal ean ear eau eba ebb ebc ebd ebe ebl ebn ebr ebu ec- eca ecb ecc ecd ece ecl ecn ecr ecu ed- eda edb edc edd ede edl edn edr edu eea eeb eec eed eee eel een eer ela elb elc eld ele ell eln elr elu en- ena enb enc end ene enl enn enr enu era erb erc erd ere erl ern err eru eu- eua eub euc eud eue eul eun eur la- laa lab lac lad lae lal lan lar lau lba lbb lbc lbd lbe lbl lbr lbu lca lcb lcc lcd lce lcl lcn lcr lcu lda ldb ldc ldd lde ldl ldn ldr ldu lea leb lec led lee lel len ler leu lla llb llc lld lle lll lln llr llu lna lnb lnc lnd lne lnl lnn lnr lnu lra lrb lrc lrd lrn lrr lru lua lub luc lud lue lul lun lur luu naa nab nac nad nae nal nan nar nau nba nbb nbc nbd nbe nbl nbn nbr nbu nca ncb ncc ncd nce ncl ncn ncr ncu nda ndb ndc ndd nde ndl ndn ndr ndu ne- nea neb nec ned nee nel nen ner neu nla nlb nlc nld nle nll nln nlr nlu nna nnb nnc nne nnl nnn nnu nra nrb nrc nrd nre nrl nrn nrr nru nua nub nuc nud nue nul nun nur nuu ra- raa rab rac rad rae ral ran rar rau rba rbb rbc rbd rbe rbl rbn rbr rbu rca rcb rcc rcd rce rcl rcn rcr rcu rda rdb rdc rdd rde rdl rdn rdr rdu re- rea reb rec red ree rel ren rer reu rla rlc rld rle rll rln rlr rlu rna rnb rnc rnd rnn rnr rnu rra rrb rrc rrd rrl rrn rrr rru rua rub ruc rud rue run rur ruu ua- uaa uab uac uad uae ual uan uar uau uba ubb ubc ube ubl ubn ubr ubu uca ucb ucc ucd uce ucl ucn ucr ucu uda udb udc udd ude udl udn udr udu uea ueb uec ued uee uel uen uer ula ulb ulc uld ule ull uln ulr ulu un- una unb unc und une unl unn unr unu ur- ura urb urc urd ure url urn urr uru uua uuc uue uun uur uuu