-al -er a-a a-b a-c aaa aab aac aae aal aan aar aau ab- aba abb abc abe abl abn abr abu ac- aca acb acc ace acl acn acr acu aea aeb aec aee ael aen aer aeu al- ala alb alc ale all aln alr alu an- ana anb anc ane anl ann anr anu ar- ara arb arc are arl arn arr aru au- aua aub auc aue aul aun aur b-u baa bab bac bae bal ban bar bau bba bbb bbc bbe bbl bbn bbr bbu bca bcb bcc bce bcl bcn bcr bcu be- bea beb bec bee bel ben ber beu bla blb blc ble bll bln blr blu bna bnb bnc bne bnl bnn bnr bnu bra brb bre brl brn brr bru bua bub buc bue bul bun bur buu c-- caa cab cac cae cal can car cau cba cbb cbc cbe cbl cbn cbr cbu cca ccb ccc cce ccl ccn ccr ccu ce- cea ceb cec cee cel cen cer ceu cl- cla clb clc cle cll cln clr clu cn- cna cnb cnc cne cnl cnn cnr cnu cra crb crc cre crl crn crr cru cua cub cuc cue cul cun cur cuu eaa eab eac eae eal ean ear eau eba ebb ebc ebe ebl ebn ebr ebu ec- eca ecb ecc ece ecl ecn ecr ecu eea eeb eec eee eel een eer ela elb elc ele ell eln elr elu en- ena enb enc ene enl enn enr enu era erb erc ere erl ern err eru eu- eua eub euc eue eul eun eur la- laa lab lac lae lal lan lar lau lba lbb lbc lbe lbl lbr lbu lca lcb lcc lce lcl lcn lcr lcu lea leb lec lee lel len ler leu lla llb llc lle lll lln llr llu lna lnb lnc lne lnl lnn lnr lnu lra lrb lrc lrn lrr lru lua lub luc lue lul lun lur luu naa nab nac nae nal nan nar nau nba nbb nbc nbe nbl nbn nbr nbu nca ncb ncc nce ncl ncn ncr ncu ne- nea neb nec nee nel nen ner neu nla nlb nlc nle nll nln nlr nlu nna nnb nnc nne nnl nnn nnu nra nrb nrc nre nrl nrn nrr nru nua nub nuc nue nul nun nur nuu ra- raa rab rac rae ral ran rar rau rba rbb rbc rbe rbl rbn rbr rbu rca rcb rcc rce rcl rcn rcr rcu re- rea reb rec ree rel ren rer reu rla rlc rle rll rln rlr rlu rna rnb rnc rnn rnr rnu rra rrb rrc rrl rrn rrr rru rua rub ruc rue run rur ruu ua- uaa uab uac uae ual uan uar uau uba ubb ubc ube ubl ubn ubr ubu uca ucb ucc uce ucl ucn ucr ucu uea ueb uec uee uel uen uer ula ulb ulc ule ull uln ulr ulu un- una unb unc une unl unn unr unu ur- ura urb urc ure url urn urr uru uua uuc uue uun uur uuu