a-a a-b a-c aaa aab aac aae aah aan aau aav ab- aba abb abc abe abh abn abu abv ac- aca acb acc ace ach acn acu acv aea aeb aec aee aeh aen aeu aev aha ahb ahc ahe ahh ahn ahu ahv an- ana anb anc ane anh ann anu anv au- aua aub auc aue auh aun auv av- ava avb avc ave avh avn avu b-u baa bab bac bae bah ban bau bav bba bbb bbc bbe bbh bbn bbu bca bcb bcc bce bch bcn bcu bcv be- bea beb bec bee beh ben beu bev bha bhb bhc bhe bhh bhu bhv bna bnb bnc bne bnn bnu bnv bua bub buc bue buh bun buu bva bvb bvc bve bvh bvn bvu bvv c-- caa cab cac cae cah can cau cav cba cbb cbc cbe cbh cbn cbu cbv cca ccb ccc cce cch ccn ccu ccv ce- cea ceb cec cee ceh cen ceu cev ch- cha chb chc che chh chn chu chv cn- cna cnb cnc cne cnh cnn cnu cnv cua cub cuc cue cuh cun cuu cuv cva cvb cvc cve cvh cvn cvu cvv eaa eab eac eae eah ean eau eav eba ebb ebc ebe ebh ebn ebu ebv ec- eca ecb ecc ece ech ecn ecu ecv eea eeb eec eee een eev eha ehb ehc ehe ehh ehn ehu ehv en- ena enb enc ene enh enn enu env eu- eua eub euc eue eun euv eva evb evc eve evh evn evv haa hab hac hae hah han hau hav hba hbb hbc hbe hbh hbn hbu hbv hca hcb hcc hce hch hcn hcv he- hea heb hec hee heh hen heu hev hha hhb hhc hhe hhh hhn hhu hhv hna hnb hnc hne hnh hnn hnu hnv hua hub huc hue huh hun huu huv hv- hva hvb hvc hvn hvv naa nab nac nae nah nan nau nav nba nbb nbc nbe nbn nbu nbv nca ncb ncc nce nch ncn ncu ncv ne- nea neb nec nee neh nen neu nev nha nhb nhc nhe nhh nhn nhu nhv nna nnb nnc nne nnh nnn nnu nnv nua nub nuc nue nuh nun nuu nuv nva nvb nvc nve nvh nvn nvu nvv ua- uaa uab uac uae uah uan uau uav uba ubb ubc ube ubh ubn ubu ubv uca ucb ucc uce uch ucn ucu ucv uea ueb uec uee ueh uen uha uhb uhc uhe uhh uhu uhv un- una unb unc une unh unn unu unv uua uuc uue uun uuu uva uvb uvc uve uvu uvv v-a v-e vaa vab vac vae vah van vau vav vba vbc vbh vbv vca vcc vce vch vcn vcu vea veb vec vee veh ven veu vh- vha vhb vhc vhe vn- vna vnu vnv vue vuv vva vvb vvc vvv