ddd ddo dds ddu ddy dod doo dos dou doy dsd dso dss dsu dsy dud duo dus duy dy- dyd dyo dys dyu dyy odd odo ods odu oo- ood ooo oos os- osd oso oss osu ou- oud ouo ous oyd oyo oys sdd sdo sds sdu sdy sod soo sos sou soy ss- ssd sso sss ssu sud suo sus suu suy sy- syd sys syu udd udo uds udu uod uoo uos usd uso uss usu uus uuu uyo uys uyu ydo yds ydy yod yoo yos you yoy yso yss ysu ysy yud yuo yus yuu yuy yys yyu yyy