-er a-a a-b a-i aaa aab aad aae aai aam aap aar ab- aba abb abd abe abi abm abp abr ad- ada adb add ade adi adm adp adr aea aeb aed aee aei aem aep aer ai- aia aib aid aie aii aim aip air ama amb amd ame ami amm amp amr ap- apa apb apd ape api apm app apr ar- ara arb ard are ari arm arp arr b-p baa bab bad bae bai bam bap bar bba bbb bbd bbe bbi bbm bbp bbr bda bdb bdd bde bdi bdm bdp bdr be- bea beb bed bee bei bem bep ber bi- bia bib bid bie bii bim bip bir bma bmb bmd bme bmi bmm bmp bmr bpa bpb bpd bpe bpi bpm bpp bpr bra brb brd bre bri brm brp brr daa dab dad dae dai dam dap dar dba dbb dbd dbe dbi dbm dbp dbr dda ddb ddd dde ddi ddm ddp ddr de- dea deb ded dee dei dem dep der di- dia dib did die dii dim dip dir dma dmb dmd dme dmi dmm dmp dmr dpa dpb dpd dpe dpi dpm dpp dpr dra drb drd dre dri drm drp drr eaa eab ead eae eai eam eap ear eba ebb ebd ebe ebi ebm ebp ebr ed- eda edb edd ede edi edm edp edr eea eeb eed eee eem eep eer eia eib eid eie eii eim eip eir em- ema emb emd eme emi emm emp emr ep- epa epb epd epe epi epm epp epr era erb erd ere eri erm erp err i-d ia- iaa iab iad iae iai iam iap iar iba ibb ibd ibe ibi ibm ibp ibr ida idb idd ide idi idm idp idr ie- iea ied iee iei iem iep ier iia iib iid iie iii iim iip iir im- ima imb imd ime imi imm imp ipa ipb ipd ipe ipi ipm ipp ipr ir- ira irb ird ire iri irm irp irr m-r maa mab mad mae mai mam map mar mba mbb mbd mbe mbi mbm mbp mbr mda mdb mdd mde mdi mdm mdp mdr mea meb med mee mei mem mep mer mi- mia mib mid mie mii mim mip mir mma mmb mmd mme mmi mmm mmp mmr mpa mpb mpd mpe mpi mpm mpp mpr mra mrb mrd mre mri mrm mrp mrr p-p paa pab pad pae pai pam pap par pba pbb pbd pbe pbi pbm pbp pbr pda pdb pdd pde pdi pdm pdp pdr pea peb ped pee pei pem pep per pia pib pid pie pii pim pip pir pma pmb pmd pme pmi pmm pmp pmr ppa ppb ppd ppe ppi ppm ppp ppr pra prb prd pre pri prm prp prr ra- raa rab rad rae rai ram rap rar rba rbb rbd rbe rbi rbm rbp rbr rda rdb rdd rde rdi rdm rdp rdr re- rea reb red ree rei rem rep rer ria rib rid rie rii rim rip rir rma rmb rmd rme rmi rmm rmp rmr rpa rpb rpd rpe rpi rpm rpp rpr rra rrb rrd rri rrm rrp rrr