a-a a-t aaa aad aae aap aat aax ad- ada add ade adp adt adx aea aed aee aep aet aex ap- apa apd ape app apt apx at- ata atd ate atp att atx ax- axa axe axp axt axx daa dad dae dap dat dax dda ddd dde ddp ddt ddx de- dea ded dee dep det dex dpa dpd dpe dpp dpt dta dtd dte dtp dtt dtx dxd dxp dxt dxx eaa ead eae eap eat eax ed- eda edd ede edp edt edx eea eed eee eep eet eex ep- epa epd epe epp ept epx eta etd ete etp ett etx ex- exa exd exe exp ext exx p-p paa pad pae pap pat pax pda pdd pde pdp pdt pdx pea ped pee pep pet pex ppa ppd ppe ppp ppt ppx pt- pta ptd pte ptp ptt ptx pxe pxt t-x taa tad tae tap tat tax tda tdd tde tdp tdt tdx te- tea ted tee tep tet tex tpa tpd tpe tpp tpt tpx tta ttd tte ttp ttt ttx txe txt xaa xad xap xat xda xde xdt xed xee xep xet xex xpa xpd xpe xpp xpt xtp xtx xxp xxx