-er ddd dde ddi ddn ddp ddr ddt de- ded dee dei den dep der det di- did die dii din dip dir dit dnd dne dni dnn dnp dnr dnt dpd dpe dpi dpn dpp dpr dpt drd dre dri drn drp drr drt dtd dte dti dtn dtp dtr dtt ed- edd ede edi edn edp edr edt eed eee een eep eer eet eid eie eii ein eip eir eit en- end ene eni enn enp enr ent ep- epd epe epi epn epp epr ept erd ere eri ern erp err ert etd ete eti etn etp etr ett i-d idd ide idi idn idp idr idt ie- ied iee iei ien iep ier iet iid iie iii iin iip iir iit in- ind ine ini inn inp inr int ipd ipe ipi ipn ipp ipr ipt ir- ird ire iri irn irp irr irt itd ite iti itn itp itt n-i ndd nde ndi ndn ndp ndr ndt ne- ned nee nei nen nep ner net nid nie nii nin nip nir nit nne nni nnn nnp nnt npd npe npi npn npp npr npt nrd nre nri nrn nrp nrr nrt ntd nte nti ntn ntp ntr ntt p-p pdd pde pdi pdn pdp pdr pdt ped pee pei pen pep per pet pid pie pii pin pip pir pit pn- pnd pne pni pnn pnp pnr pnt ppd ppe ppi ppn ppp ppr ppt prd pre pri prn prp prr prt pt- ptd pte pti ptn ptp ptr ptt rdd rde rdi rdn rdp rdr rdt re- red ree rei ren rep rer ret rid rie rii rin rip rir rit rnd rni rnn rnp rnr rnt rpd rpe rpi rpn rpp rpr rpt rrd rri rrn rrp rrr rrt rtd rte rti rtn rtp rtr rtt tdd tde tdi tdn tdp tdr tdt te- ted tee tei ten tep ter tet tid tie tii tin tip tir tit tnd tne tni tnn tnp tnr tnt tpd tpe tpi tpn tpp tpr tpt trd tre tri trn trp trr trt ttd tte tti ttn ttp ttr ttt