-al a-a a-b aaa aab aad aae aaf aag aal aan ab- aba abb abd abe abf abg abl abn ad- ada adb add ade adf adg adl adn aea aeb aed aee aef aeg ael aen af- afa afb afd afe aff afg afl afn ag- aga agb agd age agf agg agl agn al- ala alb ald ale alf alg all aln an- ana anb and ane anf ang anl ann baa bab bad bae baf bag bal ban bba bbb bbd bbe bbf bbg bbl bbn bda bdb bdd bde bdf bdg bdl be- bea beb bed bee bef beg bel ben bfa bfb bfd bfe bff bfg bfl bfn bga bgb bgd bge bgf bgg bgl bgn bla blb bld ble blf blg bll bln bna bnb bnd bne bnf bng bnl bnn daa dab dad dae daf dag dal dan dba dbb dbd dbe dbf dbg dbl dbn dda ddb ddd dde ddf ddg ddl ddn de- dea deb ded dee def deg del den dfa dfb dfd dfe dff dfg dfl dfn dga dgd dge dgf dgg dgl dgn dl- dla dlb dld dle dlf dlg dll dna dnb dnd dne dnf dng dnl dnn eaa eab ead eae eaf eag eal ean eba ebb ebd ebe ebf ebg ebl ebn ed- eda edb edd ede edf edg edl edn eea eeb eed eee eef eeg eel een ef- efa efb efd efe eff efg efl ega egb egd ege egf egg egl egn ela elb eld ele elf elg ell eln en- ena enb end ene enf eng enl enn faa fab fad fae faf fag fal fan fba fbb fbd fbe fbf fbg fbl fbn fda fdb fdd fde fdf fdg fdl fdn fea feb fed fee fef feg fel fen ffa ffd ffe fff ffg ffl ffn fga fgb fgd fge fgf fgg fgl fgn fla flb fld fle flf flg fll fln fna fnb fnd fne fnf fng fnl fnn g-d gaa gab gad gae gaf gag gal gan gba gbd gbe gbf gbg gbl gbn gda gdb gdd gde gdf gdl gdn ge- gea geb ged gee gef geg gel gen gfa gfb gfd gfe gff gfl gga ggb ggd ggg ggn gla glb gld gle glf glg gll gln gna gnb gnd gne gnf gnl gnn la- laa lab lad lae laf lag lal lan lba lbb lbd lbe lbf lbg lbl lda ldb ldd lde ldf ldg ldl ldn lea leb led lee lef leg lel len lfa lfb lfd lfe lff lfg lfl lfn lga lgb lgd lge lgf lgg lgl lgn lla llb lld lle llf llg lll lln lna lnb lnd lne lng lnl lnn naa nab nad nae naf nag nal nan nba nbb nbd nbe nbf nbg nbl nbn nda ndb ndd nde ndf ndg ndl ndn ne- nea neb ned nee nef neg nel nen nfa nfb nfd nfe nff nfl nfn nga ngb ngd nge ngf ngg ngl ngn nla nlb nld nle nlf nlg nll nln nna nnb nne nnf nng nnl nnn