-al a-a a-b a-c aaa aab aac aae aal aam aan aau ab- aba abb abc abe abl abm abn abu ac- aca acb acc ace acl acm acn acu aea aeb aec aee ael aem aen aeu al- ala alb alc ale all alm aln alu ama amb amc ame aml amm amn amu an- ana anb anc ane anl anm ann anu au- aua aub auc aue aul aum aun b-u baa bab bac bae bal bam ban bau bba bbb bbc bbe bbl bbm bbn bbu bca bcb bcc bce bcl bcm bcn bcu be- bea beb bec bee bel bem ben beu bla blb blc ble bll blm bln blu bma bmb bmc bme bml bmm bmn bmu bna bnb bnc bne bnl bnn bnu bua bub buc bue bul bum bun buu c-- caa cab cac cae cal cam can cau cba cbb cbc cbe cbl cbm cbn cbu cca ccb ccc cce ccl ccm ccn ccu ce- cea ceb cec cee cel cem cen ceu cl- cla clb clc cle cll clm cln clu cma cmb cmc cme cml cmm cmn cmu cn- cna cnb cnc cne cnl cnm cnn cnu cua cub cuc cue cul cum cun cuu eaa eab eac eae eal eam ean eau eba ebb ebc ebe ebl ebm ebn ebu ec- eca ecb ecc ece ecl ecm ecn ecu eea eeb eec eee eel eem een ela elb elc ele ell elm eln elu em- ema emb emc eme eml emm emn emu en- ena enb enc ene enl enm enn enu eu- eua eub euc eue eul eun la- laa lab lac lae lal lam lan lau lba lbb lbc lbe lbl lbm lbu lca lcb lcc lce lcl lcm lcn lcu lea leb lec lee lel lem len leu lla llb llc lle lll llm lln llu lma lmb lmc lme lml lmm lmn lmu lna lnb lnc lne lnl lnm lnn lnu lua lub luc lue lul lum lun luu maa mab mac mae mal mam man mau mba mbb mbc mbe mbl mbm mbu mc- mca mcb mcc mce mcl mcm mcn mcu mea meb mec mee mel mem men meu mla mlb mlc mle mll mlm mln mlu mma mmb mmc mme mml mmm mmn mmu mna mnb mnc mne mnl mnm mnn mnu mua mub muc mue mul mum mun muu naa nab nac nae nal nam nan nau nba nbb nbc nbe nbl nbm nbn nbu nca ncb ncc nce ncl ncm ncn ncu ne- nea neb nec nee nel nem nen neu nla nlb nlc nle nll nlm nln nlu nma nmb nmc nme nml nmm nmn nmu nna nnb nnc nne nnl nnm nnn nnu nua nub nuc nue nul num nun nuu ua- uaa uab uac uae ual uam uan uau uba ubb ubc ube ubl ubn ubu uca ucb ucc uce ucl ucm ucn ucu uea ueb uec uee uel uem uen ula ulb ulc ule ull ulm uln ulu um- uma umb umc ume uml umm umn umu un- una unb unc une unl unm unn unu uua uuc uue uum uun uuu