a-a a-i aaa aad aai aar aax ad- ada add adi adr adx ai- aia aid aii air aix ar- ara ard ari arr arx ax- axa axi axr axx daa dad dai dar dax dda ddd ddi ddr ddx di- dia did dii dir dix dra drd dri drr drx dxd dxi dxr dxx i-d ia- iaa iad iai iar ida idd idi idr idx iia iid iii iir iix ir- ira ird iri irr irx ixi ra- raa rad rai rar rax rda rdd rdi rdr rdx ria rid rii rir rix rra rrd rri rrr rxr xaa xad xar xda xdi xdr xia xii xix xrd xrx xxi xxx