ddd ddf ddi ddo ddp ddr dds dfd dff dfi dfo dfp dfr dfs di- did dif dii dio dip dir dis dod dof doi doo dop dor dos dpd dpf dpi dpo dpp dpr dps drd dri dro drp drr drs dsd dsf dsi dso dsp dsr dss fdd fdf fdi fdo fdp fdr fds ffd fff ffi ffo ffp ffr ffs fid fif fii fip fir fis fof foi foo fop for fos fpd fpi fpo fpp fpr fps frd frf fri fro frp frr frs fsd fsf fsi fso fsp fsr fss i-d i-f idd idf idi ido idp idr ids ifd iff ifi ifo ifp ifr ifs iid iif iii iio iip iir iis io- iod iof ioi ioo iop ior ios ipd ipf ipi ipo ipp ipr ips ir- ird irf iri iro irp irr irs is- isd isf isi iso isp isr iss o-i odd odf odi odo odp odr ods of- ofd off ofi ofo ofp ofr ofs oid oif oii oio oip oir ois oo- ood oof ooi ooo oop oor oos op- opd opf opi opo opp opr ops or- ord orf ori oro orp orr ors os- osd osf osi oso osp osr oss p-p pdd pdf pdi pdo pdp pdr pds pfd pff pfi pfo pfp pfr pfs pid pif pii pio pip pir pis pod pof poi poo pop por pos ppd ppf ppi ppo ppp ppr pps prd prf pri pro prp prr prs ps- psd psf psi pso psp psr pss rdd rdf rdi rdo rdp rdr rds rfd rff rfi rfo rfp rfr rfs rid rif rii rio rip rir ris rod rof roi roo rop ror ros rpd rpf rpi rpo rpp rpr rps rrd rrf rri rrp rrr rrs rsd rsf rsi rso rsp rsr rss sdd sdf sdi sdo sdp sdr sds sfd sff sfi sfo sfp sfr sfs sid sif sii sio sip sir sis sod sof soi soo sop sor sos spd spf spi spo spp spr sps sr- srd srf sri sro srp srr srs ss- ssd ssf ssi sso ssp ssr sss