ddd ddf ddi ddo ddp dds ddt dfd dff dfi dfo dfp dfs dft di- did dif dii dio dip dis dit dod dof doi doo dop dos dot dpd dpf dpi dpo dpp dps dpt dsd dsf dsi dso dsp dss dst dtd dtf dti dto dtp dts dtt fdd fdf fdi fdo fdp fds fdt ffd fff ffi ffo ffp ffs fft fid fif fii fip fis fit fof foi foo fop fos fot fpd fpi fpo fpp fps fpt fsd fsf fsi fso fsp fss fst ftd ftf fti fto ftp fts ftt i-d i-f idd idf idi ido idp ids idt ifd iff ifi ifo ifp ifs ift iid iif iii iio iip iis iit io- iod iof ioi ioo iop ios iot ipd ipf ipi ipo ipp ips ipt is- isd isf isi iso isp iss ist itd itf iti ito itp its itt o-i odd odf odi odo odp ods odt of- ofd off ofi ofo ofp ofs oft oid oif oii oio oip ois oit oo- ood oof ooi ooo oop oos oot op- opd opf opi opo opp ops opt os- osd osf osi oso osp oss ost ot- otd otf oti oto otp ots ott p-p pdd pdf pdi pdo pdp pds pdt pfd pff pfi pfo pfp pfs pft pid pif pii pio pip pis pit pod pof poi poo pop pos pot ppd ppf ppi ppo ppp pps ppt ps- psd psf psi pso psp pss pst pt- ptd ptf pti pto ptp pts ptt sdd sdf sdi sdo sdp sds sdt sfd sff sfi sfo sfp sfs sft sid sif sii sio sip sis sit sod sof soi soo sop sos sot spd spf spi spo spp sps spt ss- ssd ssf ssi sso ssp sss sst std stf sti sto stp sts stt tdd tdf tdi tdo tdp tds tdt tfd tff tfi tfo tfp tfs tft tid tif tii tio tip tis tit to- tod tof toi too top tos tot tpd tpf tpi tpo tpp tps tpt tsd tsf tsi tso tsp tss tst ttd ttf tti tto ttp tts ttt