-er ddd dde ddi ddm ddo ddp ddr de- ded dee dei dem deo dep der di- did die dii dim dio dip dir dmd dme dmi dmm dmo dmp dmr dod doe doi dom doo dop dor dpd dpe dpi dpm dpo dpp dpr drd dre dri drm dro drp drr ed- edd ede edi edm edo edp edr eed eee eem eeo eep eer eid eie eii eim eio eip eir em- emd eme emi emm emo emp emr eo- eod eoe eoi eom eoo eop eor ep- epd epe epi epm epo epp epr erd ere eri erm ero erp err i-d idd ide idi idm ido idp idr ie- ied iee iei iem iep ier iid iie iii iim iio iip iir im- imd ime imi imm imo imp io- iod ioe ioi iom ioo iop ior ipd ipe ipi ipm ipo ipp ipr ir- ird ire iri irm iro irp irr m-o m-r mdd mde mdi mdm mdo mdp mdr med mee mei mem meo mep mer mi- mid mie mii mim mio mip mir mmd mme mmi mmm mmo mmp mmr mod moe moi mom moo mop mor mpd mpe mpi mpm mpo mpp mpr mrd mre mri mrm mro mrp mrr o-i odd ode odi odm odo odp odr oed oee oei oem oeo oep oer oid oie oii oim oio oip oir om- omd ome omi omm omo omp omr oo- ood ooi oom ooo oop oor op- opd ope opi opm opo opp opr or- ord ore ori orm oro orp orr p-p pdd pde pdi pdm pdo pdp pdr ped pee pei pem peo pep per pid pie pii pim pio pip pir pmd pme pmi pmm pmo pmp pmr pod poe poi pom poo pop por ppd ppe ppi ppm ppo ppp ppr prd pre pri prm pro prp prr rdd rde rdi rdm rdo rdp rdr re- red ree rei rem reo rep rer rid rie rii rim rio rip rir rmd rme rmi rmm rmo rmp rmr rod roe roi rom roo rop ror rpd rpe rpi rpm rpo rpp rpr rrd rri rrm rrp rrr