a-a a-b aaa aab aad aae aag aak aan aao ab- aba abb abd abe abg abk abn abo ad- ada adb add ade adg adk adn ado aea aeb aed aee aeg aek aen aeo ag- aga agb agd age agg agk agn ago aka akb akd ake akg akk akn ako an- ana anb and ane ang ank ann ano aoa aob aod aoe aog aok aon aoo baa bab bad bae bag bak ban bao bba bbb bbd bbe bbg bbk bbn bbo bda bdb bdd bde bdg bdk bdo be- bea beb bed bee beg bek ben beo bga bgb bgd bge bgg bgk bgn bgo bka bkb bke bkg bkk bkn bko bna bnb bnd bne bng bnk bnn bno boa bob bod boe bog bok bon boo daa dab dad dae dag dak dan dao dba dbb dbd dbe dbg dbk dbn dbo dda ddb ddd dde ddg ddk ddn ddo de- dea deb ded dee deg dek den deo dga dgd dge dgg dgk dgn dka dkb dke dkg dkk dko dna dnb dnd dne dng dnk dnn dno doa dob dod doe dog dok don doo eaa eab ead eae eag eak ean eao eba ebb ebd ebe ebg ebk ebn ebo ed- eda edb edd ede edg edk edn edo eea eeb eed eee eeg eek een eeo ega egb egd ege egg egn ego eka ekb ekd eke ekg eko en- ena enb end ene eng enk enn eno eo- eoa eob eod eoe eog eok eon eoo g-d gaa gab gad gae gag gak gan gao gba gbd gbe gbg gbk gbn gbo gda gdb gdd gde gdk gdn gdo ge- gea geb ged gee geg gek gen geo gga ggb ggd ggg ggn ggo gka gkb gkd gkn gko gna gnb gnd gne gnn gno goa gob god goe gog gok gon goo ka- kaa kab kad kae kag kak kan kao kba kbb kbd kbe kbk kbn kbo kda kdb kde kdg kdk kdo ke- kea keb ked kee keg kek ken keo kga kgb kgd kgo kkb kke kkk kkn kn- kna knd kne kng knk knn kno koa kob kod koe kog kok kon koo naa nab nad nae nag nak nan nao nba nbb nbd nbe nbg nbk nbn nbo nda ndb ndd nde ndg ndk ndn ndo ne- nea neb ned nee neg nek nen neo nga ngb ngd nge ngg ngk ngn ngo nka nke nkk nkn nko nna nnb nne nng nnk nnn nno no- noa nob nod noe nog nok non noo oaa oab oad oae oag oak oan oao ob- oba obb obd obe obg obk obn obo oda odb odd ode odg odn odo oea oeb oed oee oeg oen oeo oga ogd oge ogg ogn ogo oka okb okd oke okg okk oko on- ona onb ond one ong onk onn ono oo- ooa oob ood oog ook oon ooo