-er ddd dde ddi ddm ddp ddr de- ded dee dei dem dep der di- did die dii dim dip dir dmd dme dmi dmm dmp dmr dpd dpe dpi dpm dpp dpr drd dre dri drm drp drr ed- edd ede edi edm edp edr eed eee eem eep eer eid eie eii eim eip eir em- emd eme emi emm emp emr ep- epd epe epi epm epp epr erd ere eri erm erp err i-d idd ide idi idm idp idr ie- ied iee iei iem iep ier iid iie iii iim iip iir im- imd ime imi imm imp ipd ipe ipi ipm ipp ipr ir- ird ire iri irm irp irr m-r mdd mde mdi mdm mdp mdr med mee mei mem mep mer mi- mid mie mii mim mip mir mmd mme mmi mmm mmp mmr mpd mpe mpi mpm mpp mpr mrd mre mri mrm mrp mrr p-p pdd pde pdi pdm pdp pdr ped pee pei pem pep per pid pie pii pim pip pir pmd pme pmi pmm pmp pmr ppd ppe ppi ppm ppp ppr prd pre pri prm prp prr rdd rde rdi rdm rdp rdr re- red ree rei rem rep rer rid rie rii rim rip rir rmd rme rmi rmm rmp rmr rpd rpe rpi rpm rpp rpr rrd rri rrm rrp rrr