-er a-a a-b a-i aaa aab aad aae aai aak aam aar ab- aba abb abd abe abi abk abm abr ad- ada adb add ade adi adk adm adr aea aeb aed aee aei aek aem aer ai- aia aib aid aie aii aik aim air aka akb akd ake aki akk akm akr ama amb amd ame ami amk amm amr ar- ara arb ard are ari ark arm arr baa bab bad bae bai bak bam bar bba bbb bbd bbe bbi bbk bbm bbr bda bdb bdd bde bdi bdk bdm bdr be- bea beb bed bee bei bek bem ber bi- bia bib bid bie bii bik bim bir bka bkb bke bkk bkm bkr bma bmb bmd bme bmi bmk bmm bmr bra brb brd bre bri brk brm brr daa dab dad dae dai dak dam dar dba dbb dbd dbe dbi dbk dbm dbr dda ddb ddd dde ddi ddk ddm ddr de- dea deb ded dee dei dek dem der di- dia dib did die dii dik dim dir dka dkb dke dki dkk dkm dkr dma dmb dmd dme dmi dmk dmm dmr dra drb drd dre dri drk drm drr eaa eab ead eae eai eak eam ear eba ebb ebd ebe ebi ebk ebm ebr ed- eda edb edd ede edi edk edm edr eea eeb eed eee eek eem eer eia eib eid eie eii eik eim eir eka ekb ekd eke eki ekr em- ema emb emd eme emi emk emm emr era erb erd ere eri erk erm err i-d ia- iaa iab iad iae iai iam iar iba ibb ibd ibe ibi ibk ibm ibr ida idb idd ide idi idk idm idr ie- iea ied iee iei iek iem ier iia iib iid iie iii iim iir ika ikb ike iki ikk ikr im- ima imb imd ime imi imm ir- ira irb ird ire iri irk irm irr ka- kaa kab kad kae kai kak kam kar kba kbb kbd kbe kbi kbk kbm kbr kda kdb kde kdk kdm kdr ke- kea keb ked kee kei kek kem ker kia kib kid kie kii kik kim kir kkb kke kki kkk kkm kkr kma kmb kmd kme kmi kmk kmm kra krd kri krk krr m-r maa mab mad mae mai mak mam mar mba mbb mbd mbe mbi mbk mbm mbr mda mdb mdd mde mdi mdk mdm mdr mea meb med mee mei mek mem mer mi- mia mib mid mie mii mik mim mir mka mkb mkd mke mkk mkm mkr mma mmb mmd mme mmi mmk mmm mmr mra mrb mrd mre mri mrk mrm mrr ra- raa rab rad rae rai rak ram rar rba rbb rbd rbe rbi rbk rbm rbr rda rdb rdd rde rdi rdm rdr re- rea reb red ree rei rek rem rer ria rib rid rie rii rik rim rir rkb rke rkk rkm rma rmb rmd rme rmi rmm rmr rra rrb rrd rri rrk rrm rrr