-er ddd dde ddi ddo ddp ddr dds de- ded dee dei deo dep der des dev di- did die dii dio dip dir dis div dod doe doi doo dop dor dos dov dpd dpe dpi dpo dpp dpr dps dpv drd dre dri dro drp drr drs drv dsd dse dsi dso dsp dsr dss dsv dvd dve dvi dvp dvr dvs ed- edd ede edi edo edp edr eds eed eee eeo eep eer ees eev eid eie eii eio eip eir eis eiv eo- eod eoe eoi eoo eop eor eos ep- epd epe epi epo epp epr eps erd ere eri ero erp err ers erv es- esd ese esi eso esp esr ess esv evd eve evi evo evp evr evs evv i-d i-v idd ide idi ido idp idr ids idv ie- ied iee iei iep ier ies iev iid iie iii iio iip iir iis io- iod ioe ioi ioo iop ior ios iov ipd ipe ipi ipo ipp ipr ips ipv ir- ird ire iri iro irp irr irs irv is- isd ise isi iso isp isr iss isv ivd ive ivi ivo ivp ivr ivs ivv o-i odd ode odi odo odp odr ods odv oed oee oei oeo oep oer oes oid oie oii oio oip oir ois oiv oo- ood ooi ooo oop oor oos oov op- opd ope opi opo opp opr ops opv or- ord ore ori oro orp orr ors orv os- osd ose osi oso osp osr oss osv ov- ovd ove ovi ovo ovp ovs ovv p-p pdd pde pdi pdo pdp pdr pds pdv ped pee pei peo pep per pes pev pid pie pii pio pip pir pis piv pod poe poi poo pop por pos pov ppd ppe ppi ppo ppp ppr pps ppv prd pre pri pro prp prr prs prv ps- psd pse psi pso psp psr pss psv pvd pve pvi pvo pvp pvr pvs pvv rdd rde rdi rdo rdp rdr rds rdv re- red ree rei reo rep rer res rev rid rie rii rio rip rir ris riv rod roe roi roo rop ror ros rov rpd rpe rpi rpo rpp rpr rps rpv rrd rri rrp rrr rrs rsd rse rsi rso rsp rsr rss rsv rvd rve rvi rvo rvp rvr rvs rvv sdd sde sdi sdo sdp sdr sds sdv se- sed see sei seo sep ser ses sev sid sie sii sio sip sir sis siv sod soe soi soo sop sor sos sov spd spe spi spo spp spr sps spv sr- srd sre sri sro srp srr srs srv ss- ssd sse ssi sso ssp ssr sss ssv svd sve svi svo svp svr svs svv v-e vdd vde vdi vdo vdp vdr vds vdv ved vee vei veo vep ver ves vi- vid vie vii vio vip vir vis viv vod voe voi voo vop vor vos vov vpd vpe vpi vpo vpp vpr vps vrd vre vri vrp vrr vrs vsd vse vsi vso vsp vsr vss vsv vvi vvo vvr vvs vvv