a-a a-b a-t aaa aab aak aan aao aap aat ab- aba abb abk abn abo abp abt aka akb akk akn ako akp an- ana anb ank ann ano anp ant aoa aob aok aon aoo aop aot ap- apa apb apk apn apo app apt at- ata atb atn ato atp att b-p baa bab bak ban bao bap bat bba bbb bbk bbn bbo bbp bbt bka bkb bkk bkn bko bkp bkt bna bnb bnk bnn bno bnp bnt boa bob bok bon boo bop bot bpa bpb bpn bpo bpp bpt bta btb btk btn bto btp btt k-t ka- kaa kab kak kan kao kap kat kba kbb kbk kbn kbo kbp kkb kkk kkn kkp kkt kn- kna knk knn kno knp knt koa kob kok kon koo kop kot kpa kpk kpn kpo kpp kpt kta ktb ktk ktn kto ktp ktt naa nab nak nan nao nap nat nba nbb nbk nbn nbo nbp nbt nka nkk nkn nko nkp nkt nna nnb nnk nnn nno nnp nnt no- noa nob nok non noo nop not npa npb npn npo npp npt nta ntb ntk ntn nto ntp ntt oaa oab oak oan oao oap oat ob- oba obb obk obn obo obp obt oka okb okk oko okp on- ona onb onk onn ono onp ont oo- ooa oob ook oon ooo oop oot op- opa opb opk opn opo opp opt ot- ota otb otk otn oto otp ott p-p paa pab pak pan pao pap pat pba pbb pbk pbn pbo pbp pbt pka pkb pkn pko pkp pkt pn- pna pnb pnk pnn pno pnp pnt poa pob pok pon poo pop pot ppa ppb ppk ppn ppo ppp ppt pt- pta ptb ptk ptn pto ptp ptt taa tab tak tan tao tap tat tba tbb tbk tbn tbo tbp tbt tka tkb tkk tko tkp tkt tna tnb tnk tnn tno tnp tnt to- toa tob tok ton too top tot tpa tpb tpk tpn tpo tpp tpt tta ttb ttk ttn tto ttp ttt