-al -ol a-a a-b aaa aab aal aan aao aap aax ab- aba abb abl abn abo abp abx al- ala alb all aln alo alp alx an- ana anb anl ann ano anp anx aoa aob aol aon aoo aop aox ap- apa apb apl apn apo app apx ax- axa axl axn axo axp axx b-p baa bab bal ban bao bap bax bba bbb bbl bbn bbo bbp bbx bla blb bll bln blo blp blx bna bnb bnl bnn bno bnp bnx boa bob bol bon boo bop box bpa bpb bpl bpn bpo bpp bpx bxb bxl bxn bxo bxx l-p la- laa lab lal lan lao lap lax lba lbb lbl lbo lbp lbx lla llb lll lln llo llp lna lnb lnl lnn lno lnp loa lob lol lon loo lop lox lpa lpb lpl lpn lpo lpp lpx lxo lxx naa nab nal nan nao nap nax nba nbb nbl nbn nbo nbp nbx nla nlb nll nln nlo nlp nlx nna nnb nnl nnn nno nnp no- noa nob nol non noo nop nox npa npb npl npn npo npp nxl oaa oab oal oan oao oap oax ob- oba obb obl obn obo obp obx ola olb oll oln olo olp on- ona onb onl onn ono onp onx oo- ooa oob ool oon ooo oop oox op- opa opb opl opn opo opp opx ox- oxa oxb oxn oxo oxx p-p paa pab pal pan pao pap pax pba pbb pbl pbn pbo pbp pbx pla plb pll pln plo plp plx pn- pna pnb pnl pnn pno pnp pnx poa pob pol pon poo pop pox ppa ppb ppl ppn ppo ppp ppx pxl xaa xal xan xap xbl xbx xla xlb xna xno xoa xon xoo xop xox xpa xpb xpl xpn xpo xpp xxl xxo xxp xxx