-al a-a a-b aaa aab aae aah aal aan ab- aba abb abe abh abl abn aea aeb aee aeh ael aen aha ahb ahe ahh ahl ahn al- ala alb ale alh all aln an- ana anb ane anh anl ann baa bab bae bah bal ban bba bbb bbe bbh bbl bbn be- bea beb bee beh bel ben bha bhb bhe bhh bhl bla blb ble blh bll bln bna bnb bne bnl bnn eaa eab eae eah eal ean eba ebb ebe ebh ebl ebn eea eeb eee eel een eha ehb ehe ehh ehl ehn ela elb ele elh ell eln en- ena enb ene enh enl enn haa hab hae hah hal han hba hbb hbe hbh hbl hbn he- hea heb hee heh hel hen hha hhb hhe hhh hhl hhn hla hlb hle hlh hll hln hna hnb hne hnh hnl hnn la- laa lab lae lah lal lan lba lbb lbe lbh lbl lea leb lee leh lel len lha lhb lhh lla llb lle lll lln lna lnb lne lnh lnl lnn naa nab nae nah nal nan nba nbb nbe nbl nbn ne- nea neb nee neh nel nen nha nhb nhe nhh nhl nhn nla nlb nle nlh nll nln nna nnb nne nnh nnl nnn