a-a a-b a-i a-t aaa aab aai aao aap aat aay ab- aba abb abi abo abp abt aby ai- aia aib aii aio aip ait aiy aoa aob aoi aoo aop aot ap- apa apb api apo app apt apy at- ata atb ati ato atp att ay- aya ayi ayo ayp ayt b-p baa bab bai bao bap bat bay bba bbb bbi bbo bbp bbt bby bi- bia bib bii bio bip bit biy boa bob boi boo bop bot boy bpa bpb bpi bpo bpp bpt bpy bta btb bti bto btp btt bty by- bya byi byo byp byt ia- iaa iab iai iao iap iat iba ibb ibi ibo ibp ibt iby iia iib iii iio iip iit io- ioa iob ioi ioo iop iot ipa ipb ipi ipo ipp ipt ipy ita itb iti ito itp itt ity iya iyo iyt iyy o-i oaa oab oai oao oap oat ob- oba obb obi obo obp obt oby oia oib oii oio oip oit oo- ooa oob ooi ooo oop oot op- opa opb opi opo opp opt opy ot- ota otb oti oto otp ott oya oyi oyo p-p paa pab pai pao pap pat pay pba pbb pbi pbo pbp pbt pby pia pib pii pio pip pit poa pob poi poo pop pot poy ppa ppb ppi ppo ppp ppt pt- pta ptb pti pto ptp ptt pty py- pya pyb pyo pyt taa tab tai tao tap tat tay tba tbb tbi tbo tbp tbt tia tib tii tio tip tit tiy to- toa tob toi too top tot toy tpa tpb tpi tpo tpp tpt tta ttb tti tto ttp ttt tty tya tyo typ tyt yaa yab yai yao yap yat yay ybi ybp yby yii yio yip yit yob yoi yoo yop yot yoy ypa ypo yta yto ytp ytt yyb yyt yyy