-er ddd dde ddh ddi ddn ddo ddp ddr ddx de- ded dee deh dei den deo dep der dex dh- dhd dhe dhh dhi dho dhp dhr di- did die dih dii din dio dip dir dix dnd dne dnh dni dnn dno dnp dnr dod doe doh doi don doo dop dor dox dpd dpe dph dpi dpn dpo dpp dpr drd dre dri drn dro drp drr drx dxd dxi dxn dxo dxp dxr dxx ed- edd ede edh edi edn edo edp edr edx eed eee een eeo eep eer eex ehd ehe ehh ehi ehn eho ehp ehr eid eie eii ein eio eip eir eix en- end ene enh eni enn eno enp enr eo- eod eoe eoh eoi eon eoo eop eor ep- epd epe eph epi epn epo epp epr epx erd ere erh eri ern ero erp err ex- exd exe exh exi exo exp exr exx h-i hdd hde hdh hdi hdn hdo hdp hdr hdx he- hed hee heh hei hen heo hep her hex hhd hhe hhh hhi hhn hho hhp hhr hid hie hih hii hin hio hip hir hix hnd hne hnh hnn hno hod hoe hoh hoi hon hoo hop hor hox hpd hpe hph hpi hpn hpo hpp hpr hr- hrd hre hrh hri hrn hro hrp hrr hxd i-d idd ide idh idi idn ido idp idr idx ie- ied iee iei ien iep ier iex ihd ihe ihh ihi ihn iho ihp ihr iid iie iih iii iin iio iip iir iix in- ind ine inh ini inn ino inp inr inx io- iod ioe ioh ioi ion ioo iop ior ipd ipe ipi ipn ipo ipp ipr ipx ir- ird ire iri irn iro irp irr irx ixe ixi ixn n-i ndd nde ndh ndi ndn ndo ndp ndr ne- ned nee neh nei nen neo nep ner nex nhd nhe nhh nhi nhn nhp nhr nid nie nih nii nin nio nip nir nix nne nnh nni nnn nno nnp no- nod noe noh noi non noo nop nor nox npd npe nph npi npn npo npp npr nrd nre nri nrn nro nrp nrr nrx nxd o-i odd ode odh odi odn odo odp odr oed oee oeh oei oen oeo oep oer oex ohd ohe ohh ohi ohn oho ohp ohr oid oie oii oin oio oip oir on- ond one onh oni onn ono onp onr onx oo- ood ooh ooi oon ooo oop oor oox op- opd ope oph opi opn opo opp opr opx or- ord ore orh ori orn oro orp orr orx ox- oxi oxn oxo oxx p-p pdd pde pdh pdi pdn pdo pdp pdr pdx ped pee peh pei pen peo pep per pex phd phe phi phn pho php phr phx pid pie pih pii pin pio pip pir pix pn- pnd pne pnh pni pnn pno pnp pnr pnx pod poe poh poi pon poo pop por pox ppd ppe pph ppi ppn ppo ppp ppr ppx prd pre prh pri prn pro prp prr prx pxe pxr rdd rde rdh rdi rdn rdo rdp rdr rdx re- red ree reh rei ren reo rep rer rex rh- rhd rhe rhh rhi rhn rho rhp rhr rid rie rih rii rin rio rip rir rix rnd rnh rni rnn rno rnp rnr rod roe roh roi ron roo rop ror rox rpd rpe rph rpi rpn rpo rpp rpr rpx rrd rrh rri rrn rrp rrr rxp rxr xde xdh xdi xdr xed xee xen xep xer xex xhd xhp xie xii xin xio xix xno xod xoi xon xoo xop xor xox xpd xpe xpn xpo xpp xrd xrx xxi xxo xxp xxx