a-a a-t aaa aad aan aao aap aat ad- ada add adn ado adp adt an- ana and ann ano anp ant aoa aod aon aoo aop aot ap- apa apd apn apo app apt at- ata atd atn ato atp att daa dad dan dao dap dat dda ddd ddn ddo ddp ddt dna dnd dnn dno dnp dnt doa dod don doo dop dot dpa dpd dpn dpo dpp dpt dta dtd dtn dto dtp dtt naa nad nan nao nap nat nda ndd ndn ndo ndp ndt nna nnn nno nnp nnt no- noa nod non noo nop not npa npd npn npo npp npt nta ntd ntn nto ntp ntt oaa oad oan oao oap oat oda odd odn odo odp odt on- ona ond onn ono onp ont oo- ooa ood oon ooo oop oot op- opa opd opn opo opp opt ot- ota otd otn oto otp ott p-p paa pad pan pao pap pat pda pdd pdn pdo pdp pdt pn- pna pnd pnn pno pnp pnt poa pod pon poo pop pot ppa ppd ppn ppo ppp ppt pt- pta ptd ptn pto ptp ptt taa tad tan tao tap tat tda tdd tdn tdo tdp tdt tna tnd tnn tno tnp tnt to- toa tod ton too top tot tpa tpd tpn tpo tpp tpt tta ttd ttn tto ttp ttt