a-a a-i aaa aad aae aai aap aax ad- ada add ade adi adp adx aea aed aee aei aep aex ai- aia aid aie aii aip aix ap- apa apd ape api app apx ax- axa axe axi axp axx daa dad dae dai dap dax dda ddd dde ddi ddp ddx de- dea ded dee dei dep dex di- dia did die dii dip dix dpa dpd dpe dpi dpp dxd dxi dxp dxx eaa ead eae eai eap eax ed- eda edd ede edi edp edx eea eed eee eep eex eia eid eie eii eip eix ep- epa epd epe epi epp epx ex- exa exd exe exi exp exx i-d ia- iaa iad iae iai iap ida idd ide idi idp idx ie- iea ied iee iei iep iex iia iid iie iii iip iix ipa ipd ipe ipi ipp ipx ixe ixi p-p paa pad pae pai pap pax pda pdd pde pdi pdp pdx pea ped pee pei pep pex pia pid pie pii pip pix ppa ppd ppe ppi ppp ppx pxe xaa xad xap xda xde xdi xed xee xep xex xia xie xii xix xpa xpd xpe xpp xxi xxp xxx