ddd ddf ddi ddk ddo dds ddt dfd dff dfi dfk dfo dfs dft di- did dif dii dik dio dis dit dki dkk dko dks dkt dod dof doi dok doo dos dot dsd dsf dsi dsk dso dss dst dtd dtf dti dtk dto dts dtt fdd fdf fdi fdk fdo fds fdt ffd fff ffi ffk ffo ffs fft fid fif fii fik fis fit fkf fki fkk fkt fof foi fok foo fos fot fsd fsf fsi fsk fso fss fst ftd ftf fti ftk fto fts ftt i-d i-f idd idf idi idk ido ids idt ifd iff ifi ifo ifs ift iid iif iii iio iis iit ikf iki ikk iko iks ikt io- iod iof ioi ioo ios iot is- isd isf isi isk iso iss ist itd itf iti itk ito its itt k-t kdf kdk kdo kds kdt kfd kff kfi kfo kfs kid kif kii kik kio kis kit kki kkk kks kkt kod kof koi kok koo kos kot ksd ksf ksi ksk kso kss kst ktf ktk kto kts ktt o-i odd odf odi odo ods odt of- ofd off ofi ofo ofs oft oid oif oii oik oio ois oit okd oki okk oko oks oo- ood oof ooi ook ooo oos oot os- osd osf osi osk oso oss ost ot- otd otf oti otk oto ots ott sdd sdf sdi sdk sdo sds sdt sfd sff sfi sfk sfo sfs sft sid sif sii sik sio sis sit sk- skd skf ski skk sko sks skt sod sof soi sok soo sos sot ss- ssd ssf ssi ssk sso sss sst std stf sti stk sto sts stt tdd tdf tdi tdk tdo tds tdt tfd tff tfi tfk tfo tfs tft tid tif tii tik tio tis tit tkk tko tks tkt to- tod tof toi tok too tos tot tsd tsf tsi tsk tso tss tst ttd ttf tti ttk tto tts ttt