a-a a-i aaa aad aai aap aar aas aax ad- ada add adi adp adr ads adx ai- aia aid aii aip air ais aix ap- apa apd api app apr aps apx ar- ara ard ari arp arr ars arx as- asa asd asi asp asr ass asx ax- axa axi axp axr axs axx daa dad dai dap dar das dax dda ddd ddi ddp ddr dds ddx di- dia did dii dip dir dis dix dpa dpd dpi dpp dpr dps dra drd dri drp drr drs drx dsa dsd dsi dsp dsr dss dsx dxd dxi dxp dxr dxs dxx i-d ia- iaa iad iai iap iar ias ida idd idi idp idr ids idx iia iid iii iip iir iis iix ipa ipd ipi ipp ipr ips ipx ir- ira ird iri irp irr irs irx is- isa isd isi isp isr iss ixi p-p paa pad pai pap par pas pax pda pdd pdi pdp pdr pds pdx pia pid pii pip pir pis pix ppa ppd ppi ppp ppr pps ppx pra prd pri prp prr prs prx ps- psa psd psi psp psr pss psx pxr pxs ra- raa rad rai rap rar ras rax rda rdd rdi rdp rdr rds rdx ria rid rii rip rir ris rix rpa rpd rpi rpp rpr rps rpx rra rrd rri rrp rrr rrs rsa rsd rsi rsp rsr rss rsx rxp rxr rxs saa sad sai sap sar sas sax sda sdd sdi sdp sdr sds sia sid sii sip sir sis six spa spd spi spp spr sps spx sr- sra srd sri srp srr srs srx ss- ssa ssd ssi ssp ssr sss ssx sxi sxs xaa xad xap xar xas xda xdi xdr xds xia xii xis xix xpa xpd xpp xps xrd xrx xsa xsi xsp xss xxi xxp xxx