-al -ol a-a a-b a-t aaa aab aak aal aao aar aat ab- aba abb abk abl abo abr abt aka akb akk akl ako akr al- ala alb alk all alo alr alt aoa aob aok aol aoo aor aot ar- ara arb ark arl aro arr art at- ata atb atl ato atr att baa bab bak bal bao bar bat bba bbb bbk bbl bbo bbr bbt bka bkb bkk bkl bko bkr bkt bla blb blk bll blo blr blt boa bob bok bol boo bor bot bra brb brk brl bro brr brt bta btb btk btl bto btr btt k-t ka- kaa kab kak kal kao kar kat kba kbb kbk kbl kbo kbr kkb kkk kkl kkr kkt kl- kla klb klo klr klt koa kob kok kol koo kor kot kra krk krl kro krr krt kta ktb ktk ktl kto ktr ktt la- laa lab lak lal lao lar lat lba lbb lbk lbl lbo lbr lbt lka lkb lkl lkr lkt lla llb llk lll llo llr llt loa lob lok lol loo lor lot lra lrb lrk lro lrr lrt lta ltb ltk ltl lto ltr ltt oaa oab oak oal oao oar oat ob- oba obb obk obl obo obr obt oka okb okk okl oko okr ola olb olk oll olo olt oo- ooa oob ook ool ooo oor oot or- ora orb ork orl oro orr ort ot- ota otb otk otl oto otr ott ra- raa rab rak ral rao rar rat rba rbb rbk rbl rbo rbr rbt rkb rkk rko rkt rla rll rlo rlr rlt roa rob rok rol roo ror rot rra rrb rrk rrl rrr rrt rta rtb rtk rtl rto rtr rtt taa tab tak tal tao tar tat tba tbb tbk tbl tbo tbr tbt tka tkb tkk tkl tko tkr tkt tla tlk tll tlo tlr tlt to- toa tob tok tol too tor tot tra trb trk trl tro trr trt tta ttb ttk ttl tto ttr ttt