a-a a-b a-c aaa aab aac aad aam aan aau ab- aba abb abc abd abm abn abu ac- aca acb acc acd acm acn acu ad- ada adb adc add adm adn adu ama amb amc amd amm amn amu an- ana anb anc and anm ann anu au- aua aub auc aud aum aun b-u baa bab bac bad bam ban bau bba bbb bbc bbd bbm bbn bbu bca bcb bcc bcd bcm bcn bcu bda bdb bdc bdd bdm bdu bma bmb bmc bmd bmm bmn bmu bna bnb bnc bnd bnn bnu bua bub buc bud bum bun buu c-- caa cab cac cad cam can cau cba cbb cbc cbd cbm cbn cbu cca ccb ccc ccd ccm ccn ccu cda cdb cdc cdd cdm cdn cdu cma cmb cmc cmd cmm cmn cmu cn- cna cnb cnc cnd cnm cnn cnu cua cub cuc cud cum cun cuu daa dab dac dad dam dan dau dba dbb dbc dbd dbm dbn dbu dca dcb dcc dcd dcm dcn dcu dda ddb ddc ddd ddm ddn ddu dma dmb dmc dmd dmm dmn dmu dna dnb dnc dnd dnm dnn dua dub duc dud dum dun maa mab mac mad mam man mau mba mbb mbc mbd mbm mbu mc- mca mcb mcc mcd mcm mcn mcu mda mdb mdc mdd mdm mdn mdu mma mmb mmc mmd mmm mmn mmu mna mnb mnc mnm mnn mnu mua mub muc mud mum mun muu naa nab nac nad nam nan nau nba nbb nbc nbd nbm nbn nbu nca ncb ncc ncd ncm ncn ncu nda ndb ndc ndd ndm ndn ndu nma nmb nmc nmd nmm nmn nmu nna nnb nnc nnm nnn nnu nua nub nuc nud num nun nuu ua- uaa uab uac uad uam uan uau uba ubb ubc ubn ubu uca ucb ucc ucd ucm ucn ucu uda udb udc udd udm udn udu um- uma umb umc umd umm umn umu un- una unb unc und unm unn unu uua uuc uum uun uuu