a-a a-i aaa aad aai aan aap aar aax ad- ada add adi adn adp adr adx ai- aia aid aii ain aip air aix an- ana and ani ann anp anr anx ap- apa apd api apn app apr apx ar- ara ard ari arn arp arr arx ax- axa axi axn axp axr axx daa dad dai dan dap dar dax dda ddd ddi ddn ddp ddr ddx di- dia did dii din dip dir dix dna dnd dni dnn dnp dnr dpa dpd dpi dpn dpp dpr dra drd dri drn drp drr drx dxd dxi dxn dxp dxr dxx i-d ia- iaa iad iai ian iap iar ida idd idi idn idp idr idx iia iid iii iin iip iir iix in- ina ind ini inn inp inr inx ipa ipd ipi ipn ipp ipr ipx ir- ira ird iri irn irp irr irx ixi ixn n-i naa nad nai nan nap nar nax nda ndd ndi ndn ndp ndr nia nid nii nin nip nir nix nna nni nnn nnp npa npd npi npn npp npr nra nrd nri nrn nrp nrr nrx nxd p-p paa pad pai pan pap par pax pda pdd pdi pdn pdp pdr pdx pia pid pii pin pip pir pix pn- pna pnd pni pnn pnp pnr pnx ppa ppd ppi ppn ppp ppr ppx pra prd pri prn prp prr prx pxr ra- raa rad rai ran rap rar rax rda rdd rdi rdn rdp rdr rdx ria rid rii rin rip rir rix rna rnd rni rnn rnp rnr rpa rpd rpi rpn rpp rpr rpx rra rrd rri rrn rrp rrr rxp rxr xaa xad xan xap xar xda xdi xdr xia xii xin xix xna xpa xpd xpn xpp xrd xrx xxi xxp xxx