-al -er a-a a-b a-t aaa aab aae aag aak aal aar aat ab- aba abb abe abg abk abl abr abt aea aeb aee aeg aek ael aer aet ag- aga agb age agg agk agl agr agt aka akb ake akg akk akl akr al- ala alb ale alg alk all alr alt ar- ara arb are arg ark arl arr art at- ata atb ate atg atl atr att baa bab bae bag bak bal bar bat bba bbb bbe bbg bbk bbl bbr bbt be- bea beb bee beg bek bel ber bet bga bgb bge bgg bgk bgl bgr bgt bka bkb bke bkg bkk bkl bkr bkt bla blb ble blg blk bll blr blt bra brb bre brg brk brl brr brt bta btb bte btg btk btl btr btt eaa eab eae eag eak eal ear eat eba ebb ebe ebg ebk ebl ebr ebt eea eeb eee eeg eek eel eer eet ega egb ege egg egl egr egt eka ekb eke ekg ekl ekr ekt ela elb ele elg elk ell elr elt era erb ere erg erk erl err ert eta etb ete etg etk etl etr ett gaa gab gae gag gak gal gar gat gba gbe gbg gbk gbl gbr gbt ge- gea geb gee geg gek gel ger get gga ggb ggg ggr ggt gka gkb gkt gla glb gle glg glk gll glr glt gra grb gre grg grk grl grr grt gta gtb gte gtg gtk gtl gtr gtt k-t ka- kaa kab kae kag kak kal kar kat kba kbb kbe kbk kbl kbr ke- kea keb kee keg kek kel ker ket kga kgb kgl kkb kke kkk kkl kkr kkt kl- kla klb klg klr klt kra krg krk krl krr krt kta ktb kte ktg ktk ktl ktr ktt la- laa lab lae lag lak lal lar lat lba lbb lbe lbg lbk lbl lbr lbt lea leb lee leg lek lel ler let lga lgb lge lgg lgk lgl lgr lgt lka lkb lkg lkl lkr lkt lla llb lle llg llk lll llr llt lra lrb lrg lrk lrr lrt lta ltb lte ltg ltk ltl ltr ltt ra- raa rab rae rag rak ral rar rat rba rbb rbe rbg rbk rbl rbr rbt re- rea reb ree reg rek rel rer ret rga rgb rge rgg rgk rgr rgt rkb rke rkg rkk rkt rla rle rlg rll rlr rlt rra rrb rrg rrk rrl rrr rrt rta rtb rte rtg rtk rtl rtr rtt taa tab tae tag tak tal tar tat tba tbb tbe tbg tbk tbl tbr tbt te- tea teb tee teg tek tel ter tet tga tgb tge tgg tgk tgl tgr tgt tka tkb tke tkg tkk tkl tkr tkt tla tle tlg tlk tll tlr tlt tra trb tre trg trk trl trr trt tta ttb tte ttg ttk ttl ttr ttt