a-a a-b a-c aaa aab aac aad aae aam aan aau ab- aba abb abc abd abe abm abn abu ac- aca acb acc acd ace acm acn acu ad- ada adb adc add ade adm adn adu aea aeb aec aed aee aem aen aeu ama amb amc amd ame amm amn amu an- ana anb anc and ane anm ann anu au- aua aub auc aud aue aum aun b-u baa bab bac bad bae bam ban bau bba bbb bbc bbd bbe bbm bbn bbu bca bcb bcc bcd bce bcm bcn bcu bda bdb bdc bdd bde bdm bdu be- bea beb bec bed bee bem ben beu bma bmb bmc bmd bme bmm bmn bmu bna bnb bnc bnd bne bnn bnu bua bub buc bud bue bum bun buu c-- caa cab cac cad cae cam can cau cba cbb cbc cbd cbe cbm cbn cbu cca ccb ccc ccd cce ccm ccn ccu cda cdb cdc cdd cde cdm cdn cdu ce- cea ceb cec ced cee cem cen ceu cma cmb cmc cmd cme cmm cmn cmu cn- cna cnb cnc cnd cne cnm cnn cnu cua cub cuc cud cue cum cun cuu daa dab dac dad dae dam dan dau dba dbb dbc dbd dbe dbm dbn dbu dca dcb dcc dcd dce dcm dcn dcu dda ddb ddc ddd dde ddm ddn ddu de- dea deb dec ded dee dem den deu dma dmb dmc dmd dme dmm dmn dmu dna dnb dnc dnd dne dnm dnn dua dub duc dud due dum dun eaa eab eac ead eae eam ean eau eba ebb ebc ebd ebe ebm ebn ebu ec- eca ecb ecc ecd ece ecm ecn ecu ed- eda edb edc edd ede edm edn edu eea eeb eec eed eee eem een em- ema emb emc emd eme emm emn emu en- ena enb enc end ene enm enn enu eu- eua eub euc eud eue eun maa mab mac mad mae mam man mau mba mbb mbc mbd mbe mbm mbu mc- mca mcb mcc mcd mce mcm mcn mcu mda mdb mdc mdd mde mdm mdn mdu mea meb mec med mee mem men meu mma mmb mmc mmd mme mmm mmn mmu mna mnb mnc mne mnm mnn mnu mua mub muc mud mue mum mun muu naa nab nac nad nae nam nan nau nba nbb nbc nbd nbe nbm nbn nbu nca ncb ncc ncd nce ncm ncn ncu nda ndb ndc ndd nde ndm ndn ndu ne- nea neb nec ned nee nem nen neu nma nmb nmc nmd nme nmm nmn nmu nna nnb nnc nne nnm nnn nnu nua nub nuc nud nue num nun nuu ua- uaa uab uac uad uae uam uan uau uba ubb ubc ube ubn ubu uca ucb ucc ucd uce ucm ucn ucu uda udb udc udd ude udm udn udu uea ueb uec ued uee uem uen um- uma umb umc umd ume umm umn umu un- una unb unc und une unm unn unu uua uuc uue uum uun uuu