a-a aaa aad aao aar aas aax ad- ada add ado adr ads adx aoa aod aoo aor aos aox ar- ara ard aro arr ars arx as- asa asd aso asr ass asx ax- axa axo axr axs axx daa dad dao dar das dax dda ddd ddo ddr dds ddx doa dod doo dor dos dox dra drd dro drr drs drx dsa dsd dso dsr dss dsx dxd dxo dxr dxs dxx oaa oad oao oar oas oax oda odd odo odr ods oo- ooa ood ooo oor oos oox or- ora ord oro orr ors orx os- osa osd oso osr oss osx ox- oxa oxo oxx ra- raa rad rao rar ras rax rda rdd rdo rdr rds rdx roa rod roo ror ros rox rra rrd rrr rrs rsa rsd rso rsr rss rsx rxr rxs saa sad sao sar sas sax sda sdd sdo sdr sds soa sod soo sor sos sox sr- sra srd sro srr srs srx ss- ssa ssd sso ssr sss ssx sxs xaa xad xar xas xda xdr xds xoa xod xoo xor xos xox xrd xrx xsa xss xxo xxx