a-a a-b a-c aaa aab aac aad aae aah aan aau ab- aba abb abc abd abe abh abn abu ac- aca acb acc acd ace ach acn acu ad- ada adb adc add ade adh adn adu aea aeb aec aed aee aeh aen aeu aha ahb ahc ahd ahe ahh ahn ahu an- ana anb anc and ane anh ann anu au- aua aub auc aud aue auh aun b-u baa bab bac bad bae bah ban bau bba bbb bbc bbd bbe bbh bbn bbu bca bcb bcc bcd bce bch bcn bcu bda bdb bdc bdd bde bdh bdu be- bea beb bec bed bee beh ben beu bha bhb bhc bhd bhe bhh bhu bna bnb bnc bnd bne bnn bnu bua bub buc bud bue buh bun buu c-- caa cab cac cad cae cah can cau cba cbb cbc cbd cbe cbh cbn cbu cca ccb ccc ccd cce cch ccn ccu cda cdb cdc cdd cde cdh cdn cdu ce- cea ceb cec ced cee ceh cen ceu ch- cha chb chc chd che chh chn chu cn- cna cnb cnc cnd cne cnh cnn cnu cua cub cuc cud cue cuh cun cuu daa dab dac dad dae dah dan dau dba dbb dbc dbd dbe dbh dbn dbu dca dcb dcc dcd dce dcn dcu dda ddb ddc ddd dde ddh ddn ddu de- dea deb dec ded dee deh den deu dh- dha dhb dhc dhd dhe dhh dhu dna dnb dnc dnd dne dnh dnn dua dub duc dud due duh dun eaa eab eac ead eae eah ean eau eba ebb ebc ebd ebe ebh ebn ebu ec- eca ecb ecc ecd ece ech ecn ecu ed- eda edb edc edd ede edh edn edu eea eeb eec eed eee een eha ehb ehc ehd ehe ehh ehn ehu en- ena enb enc end ene enh enn enu eu- eua eub euc eud eue eun haa hab hac had hae hah han hau hba hbb hbc hbd hbe hbh hbn hbu hca hcb hcc hcd hce hch hcn hda hdb hdc hdd hde hdh hdn hdu he- hea heb hec hed hee heh hen heu hha hhb hhc hhd hhe hhh hhn hhu hna hnb hnc hnd hne hnh hnn hnu hua hub huc hud hue huh hun huu naa nab nac nad nae nah nan nau nba nbb nbc nbd nbe nbn nbu nca ncb ncc ncd nce nch ncn ncu nda ndb ndc ndd nde ndh ndn ndu ne- nea neb nec ned nee neh nen neu nha nhb nhc nhd nhe nhh nhn nhu nna nnb nnc nne nnh nnn nnu nua nub nuc nud nue nuh nun nuu ua- uaa uab uac uad uae uah uan uau uba ubb ubc ube ubh ubn ubu uca ucb ucc ucd uce uch ucn ucu uda udb udc udd ude udn udu uea ueb uec ued uee ueh uen uha uhb uhc uhd uhe uhh uhu un- una unb unc und une unh unn unu uua uuc uue uun uuu