a-a a-b a-t aaa aab aan aao aap aas aat aay ab- aba abb abn abo abp abs abt aby an- ana anb ann ano anp ans ant any aoa aob aon aoo aop aos aot ap- apa apb apn apo app aps apt apy as- asa asb asn aso asp ass ast asy at- ata atb atn ato atp ats att ay- aya ayn ayo ayp ays ayt b-p baa bab ban bao bap bas bat bay bba bbb bbn bbo bbp bbs bbt bby bna bnb bnn bno bnp bns bnt boa bob bon boo bop bos bot boy bpa bpb bpn bpo bpp bps bpt bpy bsa bsb bsn bso bsp bss bst bsy bta btb btn bto btp bts btt bty by- bya byn byo byp bys byt naa nab nan nao nap nas nat nay nba nbb nbn nbo nbp nbs nbt nna nnb nnn nno nnp nns nnt no- noa nob non noo nop nos not noy npa npb npn npo npp nps npt nsa nsb nsn nso nsp nss nst nsy nta ntb ntn nto ntp nts ntt nya nyn nyo nyp nys nyt nyy oaa oab oan oao oap oas oat ob- oba obb obn obo obp obs obt oby on- ona onb onn ono onp ons ont ony oo- ooa oob oon ooo oop oos oot op- opa opb opn opo opp ops opt opy os- osa osb osn oso osp oss ost ot- ota otb otn oto otp ots ott oya oyo oys p-p paa pab pan pao pap pas pat pay pba pbb pbn pbo pbp pbs pbt pby pn- pna pnb pnn pno pnp pns pnt pny poa pob pon poo pop pos pot poy ppa ppb ppn ppo ppp pps ppt ps- psa psb psn pso psp pss pst psy pt- pta ptb ptn pto ptp pts ptt pty py- pya pyb pyn pyo pys pyt saa sab san sao sap sas sat say sba sbb sbn sbo sbp sbs sbt sby sna snb snn sno snp sns snt sny soa sob son soo sop sos sot soy spa spb spn spo spp sps spt spy ss- ssa ssb ssn sso ssp sss sst sta stb stn sto stp sts stt sty sy- sya syb syn syp sys syt taa tab tan tao tap tas tat tay tba tbb tbn tbo tbp tbs tbt tna tnb tnn tno tnp tns tnt to- toa tob ton too top tos tot toy tpa tpb tpn tpo tpp tps tpt tsa tsb tsn tso tsp tss tst tsy tta ttb ttn tto ttp tts ttt tty tya tyn tyo typ tys tyt yaa yab yan yao yap yas yat yay ybp ybs yby yna ynn ynp yns yny yob yon yoo yop yos yot yoy ypa ypo yps ysa ysb yso ysp yss yst ysy yta ytn yto ytp yts ytt yyb yys yyt yyy