ddd ddi ddn ddo dds ddx di- did dii din dio dis dix dnd dni dnn dno dns dod doi don doo dos dox dsd dsi dsn dso dss dsx dxd dxi dxn dxo dxs dxx i-d idd idi idn ido ids idx iid iii iin iio iis iix in- ind ini inn ino ins inx io- iod ioi ion ioo ios is- isd isi isn iso iss ixi ixn n-i ndd ndi ndn ndo nds nid nii nin nio nis nix nni nnn nno nns no- nod noi non noo nos nox nsd nsi nsn nso nss nsx nxd o-i odd odi odn odo ods oid oii oin oio ois on- ond oni onn ono ons onx oo- ood ooi oon ooo oos oox os- osd osi osn oso oss osx ox- oxi oxn oxo oxx sdd sdi sdn sdo sds sid sii sin sio sis six snd sni snn sno sns sod soi son soo sos sox ss- ssd ssi ssn sso sss ssx sxi sxn sxs xdi xds xii xin xio xis xix xno xns xod xoi xon xoo xos xox xsi xss xxi xxo xxx